Document And Entity Information [Abstract] Statement [Table] Statement [Line Items] Document Type Document Annual Report Document Period End Date Document Fiscal Year Focus Current Fiscal Year End Date Document Transition Report Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company ICFR Auditor Attestation Flag Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction Flag Entity Shell Company Entity Public Float Entity Common Stock, Shares Outstanding Documents Incorporated by Reference [Text Block] Documents Incorporated by Reference Amendment Flag Document Fiscal Period Focus Entity Central Index Key Auditor Firm ID Auditor Location Auditor Name Consolidated Balance Sheets [Abstract] Assets Property, plant and equipment, at cost Total property, plant and equipment Less: accumulated depreciation Net property, plant and equipment Net property, plant and equipment Current assets: Cash and cash equivalents Cash and cash equivalents at end of year Accounts receivable, net Accounts receivable, net Unbilled Receivables, Current Unbilled revenues Inventory - materials and supplies Energy Related Inventory, Natural Gas in Storage Inventory - gas stored Prepayments and other current assets Prepayments and other current assets Regulatory Assets, Current Regulatory assets Total current assets Total current assets Regulatory Assets Noncurrent Regulatory assets Deferred Costs and Other Assets Deferred charges and other assets, net Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Investment in joint venture Investment in subsidiaries Restricted Cash and Cash Equivalents, Noncurrent Funds restricted for construction activity Goodwill Balance Balance Goodwill Operating Lease, Right-of-Use Asset Operating lease right-of-use assets Deferred Tax Assets, Gross, Noncurrent Deferred income tax asset Intangible Assets, Net (Excluding Goodwill) Intangible assets Total Assets Total assets Liabilities and Equity Stockholders' equity: Common stock authorized and issued Common stock at $0.50 par value, authorized 600,000,000 shares, issued 286,505,895 and 278,209,660 as of December 31, 2025 and December 31, 2024 Common stock, $0.50 par value Additional Paid In Capital Common Stock Capital in excess of par value Retained Earnings Accumulated Deficit Retained earnings Aqua Pennsylvania's retained earnings including minority interest Treasury stock, at cost Treasury stock, at cost, 3,423,086 and 3,386,069 shares as of December 31, 2025 and December 31, 2024 Treasury stock, at cost Total Aqua America stockholders' equity Balance Balance Total stockholders' equity Stockholders' equity Debt Instrument Carrying Amount Noncurrent Debt Instrument Carrying Amount Noncurrent Long-term debt, excluding current portion Long-term debt, excluding current portion Unamortized Debt Issuance Expense Less: debt issuance costs and unamortized discount on debt Less: debt issuance costs Long Term Debt Noncurrent Long-term debt, excluding current portion, net of debt issuance costs and unamortized discount on debt Long-term debt, excluding current portion, net of debt issuance costs Commitments and contingencies 2009 Commitments and contingencies (See Note 10) Current liabilities: Current portion of long-term debt Loans Payable, Current, Not Included In Current Portion Of Long Term Debt Loans Payable, Current, Not Included In Current Portion Of Long Term Debt Loans payable Accounts payable Bank Overdrafts Book overdraft Interest Payable, Current Accrued interest Accrued taxes Regulatory Liability, Current Regulatory liabilities Income tax reserve regulatory liability Dividends Payable, Current Dividends payable Accrued Liabilities Current Other accrued liabilities Total current liabilities Total current liabilities Deferred credits and other liabilities: Deferred income taxes and investment tax credits Customers' advances for construction Customers' advances for construction Regulatory Liability Noncurrent Regulatory liabilities Operating Lease, Liability, Noncurrent Operating lease liabilities Postemployment Benefits Liability, Noncurrent Pension and other postretirement benefit liabilities Other Liabilities Noncurrent Other Other liabilities Liabilities, Noncurrent, Less Long Term Debt Liabilities, Noncurrent, Less Long Term Debt Total deferred credits and other liabilities Contributions in aid of construction Total liabilities and stockholders' equity Total liabilities and equity Common stock, par value Common stock, par value Common stock, shares authorized Common stock, authorized Common stock, shares issued Treasury stock, shares Treasury shares Consolidated Statements Of Operations And Comprehensive Income [Abstract] Operating revenues Consolidated Cost and expenses: Operating expenses: Utilities Operating Expense Maintenance And Operations Operations and maintenance Operations and maintenance expense Utilities Operating Expense, Gas and Petroleum Purchased Purchased gas Depreciation Amortization Taxes other than income taxes Total taxes other than income Total expenses Total operating expenses Operating income Operating income Other expense (income): Interest expense Interest expense Interest Income, Operating Interest income Public Utilities Allowance For Funds Used During Construction Additions Allowance for funds used during construction Gain Loss On Sale Of Other Assets Gain on sale of other assets Other Nonoperating Income (Expense) Other Other income Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income before income taxes Provision for income taxes (benefit) Provision for income taxes (benefit) Total income tax benefit Income tax expense (benefit) Net income attributable to common shareholders Net income Net income Net income (loss) Comprehensive income Comprehensive income Net Income per Common Share And Equity per Common Share [Abstract] Net income per common share: Earnings Per Share Basic Basic Earnings Per Share Diluted Diluted Weighted Average Number of Shares Outstanding Abstract Average common shares outstanding during the period: Basic Average common shares outstanding during the period for basic computation Diluted Average common shares outstanding during the period for diluted computation Condensed Consolidated Statements Of Capitalization [Abstract] Consolidated Statements Of Capitalization [Abstract] Long-term debt of subsidiaries (substantially collateralized by utility plant): Secured Debt Long-term debt of subsidiaries Other Notes Payable, Noncurrent Notes payable to bank under revolving credit agreement, variable rate, due 2027 Notes ranging from 4.62% to 4.87%, due 2013 through 2024 Unsecured notes payable Debt Instrument, Principal Outstanding Total long-term debt Total capitalization Total capitalization Interest Rate Interest Rate Interest rate Debt Instrument, Maturity Date, Year Debt Instrument, Maturity Date, Year Maturity date Consolidated Statements Of Equity [Abstract] Statement, Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Parent [Member] Parent [Member] Common Stock [Member] Common Stock [Member] Additional Paid In Capital [Member] Capital In Excess Of Par Value [Member] Retained Earnings [Member] Retained Earnings [Member] Treasury Stock Common [Member] Treasury Stock [Member] Dividends, Common Stock, Paid-in-kind Dividends declared and paid Dividends paid Dividends declared Stock issued during period Issuance of common stock under dividend reinvestment plan Common stock sold under dividend reinvestment plan Stock Issued During Period, Value, New Issues, Forward Equity Sale Agreement Stock Issued During Period, Value, New Issues, Forward Equity Sale Agreement Issuance of common stock from at-the-market sale agreements Repurchase of stock (414,869 shares) Repurchase of stock Stock granted during period, value share-based compensation Equity compensation plan Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Treasury Stock Reissued at Lower than Repurchase Price, Share-based Compensation Treasury Stock Reissued at Lower than Repurchase Price, Share-based Compensation Stock-based compensation Other Condensed Consolidated Statements Of Equity (Parenthetical) [Abstract] Common stock, dividends, per share, cash paid Cash dividends declared per common share Dividend declared per common share StockIssuedDuringPeriodSharesDividendReinvestmentPlan Issuance of common stock under dividend reinvestment plan, shares Issue of common shares under dividend reinvestment plan Stock Issued During Period, Shares, New Issues, Forward Equity Sale Agreement Stock Issued During Period, Shares, New Issues, Forward Equity Sale Agreement Issuance of common stock from at-the-market sale agreements, shares Repurchase Of Stock, Shares Repurchase of stock, shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Granted, Number of Share Units Equity compensation plan, shares Exercise Of Stock Options, Shares Exercised, Shares Exercise of stock options, shares Consolidated Statements Of Cash Flows [Abstract] Cash flows from operating activities: Adjustments to reconcile net income to net cash flows from operating activities: Adjustments to reconcile net income to net cash flows from operating activities: Depreciation and amortization Deferred Income Tax Expense (Benefit), Total Deferred income taxes Total deferred income taxes Provision for doubtful accounts Share Based Compensation Stock-based compensation Gain (Loss) on Sale of Business Gain on sale of utility systems and other assets Increase (Decrease) in Inventories, Receivables, And Prepayments Increase (Decrease) in Inventories, Receivables, And Prepayments Net change in receivables, deferred purchased gas costs, inventory and prepayments Net decrease in payables, accrued interest, accrued taxes and other accrued liabilities Net change in payables, accrued interest, accrued taxes and other accrued liabilities Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits Pension and other postretirement benefits contributions Increase Decrease In Other Operating Assets Other, net Net cash flows from operating activities Net cash flows from operating activities Net cash flows used in operating activities Cash flows from investing activities: Payments to acquire property, plant and equipment Property, plant and equipment additions, including the debt component of allowance for funds used during construction of $7,975, $7,372 and $5,241 Capital expenditures Payments to Acquire Waste Water Systems Acquisitions of utility systems, net Acquisitions of utility systems and other, net Increase Decrease In Investment Of Subsidiary Increase Decrease In Investment Of Subsidiary Increase in investment in subsidiaries Proceeds from sale of utility system and other Proceeds from sale of utility system and other Proceeds from the sale of utility systems and other assets Payments to Acquire Notes Receivable Convertible note investment Payments for (Proceeds from) Other Investing Activities Other, net Other Net cash flows used in investing activities Net cash flows used in investing activities Cash flows from financing activities: Proceeds from Advances for Construction, Financing Activities Proceeds from Advances for Construction, Financing Activities Customers' advances and contributions in aid of construction Repayments of Advances for Construction, Financing Activities Repayments of Advances for Construction, Financing Activities Repayments of customers' advances Net proceeds (repayments) of short-term debt Net proceeds (repayments) of short-term debt Net proceeds from commercial paper program Net Proceeds From Commercial Paper Program Net proceeds from commercial paper program Net proceeds of commercial paper Proceeds from Issuance of Other Long-Term Debt Proceeds from other long-term debt Proceeds from long-term debt Repayments of Other Long-Term Debt Repayments of other long-term debt Repayments of long-term debt Proceeds From Repayments Of Bank Overdrafts, Less Short Term Debt Proceeds From Repayments Of Bank Overdrafts, Less Short Term Debt Change in cash overdraft position Proceeds from issuance of common stock under dividend reinvestment plan Proceeds from Other Equity Proceeds from issuance of common stock from at-the-market sale agreement Proceeds from issuance of common stock from at-the market sale agreement Proceeds from stock options exercised Proceeds from exercised stock options Payments For Repurchase Of Common Stock Repurchase of common stock Payments Of Dividends Common Stock Dividends paid on common stock Proceeds from (Payments for) Other Financing Activities Other, net Other Net cash flows from financing activities Net cash flows from financing activities Net increase in cash and cash equivalents Net change in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents at end of year Cash and cash equivalents at beginning of year Supplemental Cash Flow Information [Abstract] Cash paid during the year for: Interest Paid, Excluding Capitalized Interest, Operating Activities Interest, net of amounts capitalized Income Taxes Paid Income taxes Non-cash investing activities: Property, plant and equipment additions purchased at the period end, but not yet paid for Non-Cash Customer Advances And Contributions In Aid Of Construction Non-Cash Customer Advances And Contributions In Aid Of Construction Non-cash utility property contributions Debt component of allowance for funds used during construction Debt component of allowance for funds used during construction Summary Of Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Summary Of Significant Accounting Policies Water And Wastewater Utility Acquisitions [Abstract] Business Combination Disclosure [Text Block] Water And Wastewater Utility Acquisitions Dispositions [Abstract] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Dispositions Property, Plant And Equipment [Abstract] Property, Plant and Equipment Disclosure [Text Block] Property, Plant And Equipment Accounts Receivable [Abstract] Financing Receivables [Text Block] Accounts Receivable Regulatory Assets And Liabilities [Abstract] Schedule of Regulatory Assets and Liabilities [Text Block] Regulatory Assets And Liabilities Convertible Note Investment [Abstract] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt and Equity Securities, FV-NI [Line Items] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Convertible Note Investment Income Taxes [Abstract] Income Tax Disclosure Text Block Income Taxes Taxes Other than Income Taxes Taxes Other Than Income Taxes [Abstract] Utilities Operating Expenses, Taxes As In Annual Report [Text Block] Utilities Operating Expenses, Taxes As In Annual Report [Text Block] Taxes Other Than Income Taxes Commitments And Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments And Contingencies Leases [Abstract] Disclosure of information about leases. Leases [Table] Lessee, Operating Leases [Text Block] Leases Long-Term Debt And Loans Payable [Abstract] Long-term Debt [Text Block] Long-Term Debt And Loans Payable Fair Value Of Financial Instruments [Abstract] Fair Value Disclosures [Text Block] Fair Value Of Financial Instruments Stockholders’ Equity [Abstract] Stockholders' Equity Note Disclosure [Text Block] Stockholders’ Equity Earnings Per Share [Text Block] Net Income per Common Share And Equity per Common Share Employee Stock And Incentive Plan [Abstract] Disclosure Of Compensation Related Costs Share Based Payments Text Block Employee Stock And Incentive Plan Pension Plans And Other Postretirement Benefits [Abstract] Pension And Other Postretirement Benefits Disclosure [Text Block] Pension Plans And Other Postretirement Benefits Rate Activity [Abstract] Rate Activity [Abstract] Public Utilities Disclosure [Text Block] Rate Activity Segment Information [Abstract] Segment Reporting Disclosure [Text Block] Segment Information Other Supplemental Cash Flow Information [Abstract] Cash Flow, Supplemental Disclosures [Text Block] Other Supplemental Cash Flow Information Schedule 1 - Condensed Parent Company Financial Statements [Abstract] Condensed Financial Statements [Table] Condensed Financial Statements, Captions [Line Items] Condensed Financial Information of Parent Company Only Disclosure [Text Block] Condensed Financial Information Of Parent Company Nature of Operations [Text Block] Nature Of Operations Regulation Policy [TextBlock] Regulation Policy [TextBlock] Regulation Consolidation, Policy [Policy Text Block] Use Of Estimates In Preparation Of Consolidated Financial Statements Basis of Accounting, Policy [Policy Text Block] Basis Of Presentation Property, Plant and Equipment, Policy [Policy Text Block] Property, Plant And Equipment And Depreciation Property, Plant and Equipment, Impairment [Policy Text Block] Impairment of Long-Lived Assets Allowance for Funds Used During Construction, Policy [Policy Text Block] Allowance For Funds Used During Construction Separation of Lease and Nonlease Components [Policy Text Block] Lease Accounting Revenue [Policy Text Block] Recognition Of Revenues Revenue from Contract with Customer [Policy Text Block] Revenues From Contracts With Customers Cash and Cash Equivalents, Policy [Policy Text Block] Cash And Cash Equivalents Receivable [Policy Text Block] Accounts Receivable Inventory, Policy [Policy Text Block] Inventories Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Goodwill Intangible Assets Arising from Insurance Contracts Acquired in Business Combination, Policy [Policy Text Block] Intangible assets Derivatives, Policy [Policy Text Block] Derivative Instruments Regulatory Assets Deferred Charges And Other Assets Policy [TextBlock] Regulatory Assets Deferred Charges And Other Assets Policy [TextBlock] Deferred Charges And Other Assets Income Tax, Policy [Policy Text Block] Income Taxes Customers Advances For Construction And Contributions In Aid Of Construction [PolicyTextBlock] Customers Advances For Construction And Contributions In Aid Of Construction [PolicyTextBlock] Customers Advances For Construction And Contributions In Aid Of Construction Share-Based Payment Arrangement [Policy Text Block] Stock-Based Compensation Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value Measurements New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Disaggregation of Revenue [Table Text Block] Schedule Of Disaggregation Of Revenue Schedule of Goodwill [Text Block] Summary Of Changes In Goodwill Schedule of Public Utility Property, Plant, and Equipment [Table Text Block] Schedule Of Property, Plant And Equipment Schedule Of Accounts Receivable [Table Text Block] Schedule Of Accounts Receivable [Table Text Block] Net Accounts Receivable Schedule Of Allowance For Doubtful Accounts [Table Text Block] Allowance For Doubtful Accounts Schedule of Regulatory Assets And Liabilities [Table Text Block] Schedule of Regulatory Assets And Liabilities [Table Text Block] Components Of Regulatory Assets And Regulatory Liabilities Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Schedule Of Changes In The Fair Value Of Level 3 Investment Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule Of Provision For Income Taxes Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule Of Reasons For Differences Between Statutory Federal Income Tax Rate To Income Before Income Tax Expense Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Unrecognized Tax Benefits Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule Of Deferred Tax Assets And Liabilities Summary of Valuation Allowance [Table Text Block] Changes In Valuation Allowance For Deferred Tax Assets Utilities Operating Expenses, Taxes As In Annual Report [Table Text Block] Utilities Operating Expenses, Taxes As In Annual Report [Table Text Block] Components Of Taxes Other Than Income Taxes Schedule of Operating Leased Assets [Table] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Recorded Unconditional Purchase Obligations [Table Text Block] Schedule Of Purchase Obligations Schedule Of Long Term Agreements [Table Text Block] Schedule Of Long Term Agreements [Table Text Block] Schedule Of Long Term Agreements Lease, Cost [Table Text Block] Components Of Lease Expense Lessee, Operating Lease, Liability, Maturity [Table Text Block] Maturities Of Operating Lease Liabilities Long Term Debt And Loans Payable [Abstract] Long Term Debt And Loans Payable [Abstract] Schedule of Maturities of Long-term Debt [Table Text Block] Schedule Of Long-Term Debt Future Sinking Fund Payments And Debt Maturities Gain (Loss) on Securities [Table Text Block] Summary Of Unrealized Gains And Losses On Equity Securities Fair Value, by Balance Sheet Grouping [Text Block] Schedule Of Carrying Amounts And Estimated Fair Values Of Long-Term Debt Schedule of Stockholders Equity [Table Text Block] Shares Outstanding And Treasury Shares Held Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule Of Earnings Per Share Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type and Plan Name [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Performance Share Units [Member] Performance Share Units [Member] Performance Share Units [Member] Restricted Stock Units R S U [Member] Restricted Stock Units [Member] Employee Stock Option [Member] Stock Options [Member] Restricted Stock [Member] Restricted Stock [Member] Stock Compensation Plan [Member] Stock Awards [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Schedule Of Share Based Compensation, Performance Goals, Metrics [Table Text Block] Schedule Of Share Based Compensation, Performance Goals, Metrics [Table Text Block] Schedule Of Performance Goals Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Summary Of Compensation Costs Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Other Than Options, Grants in Period, Grant Date Intrinsic Value [Table Text Block] Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Other Than Options, Grants in Period, Grant Date Intrinsic Value [Table Text Block] Summary Of Value Of Stock Awards Schedule of Nonvested Performance-based Units Activity [Table Text Block] Summary Of PSU Transactions Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Assumptions Used In The Pricing Model Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Summary Of RSU Transactions Schedule Of Share Based Compensation Value Of Restricted Stock Units [Table Text Block] Schedule Of Share Based Compensation Value Of Restricted Stock Units [Table Text Block] Summary Of Value Of Restricted Stock Units Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Summary Of Stock Option Transactions Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value [Table Text Block] Summary Of Stock Options Exercised And Vested Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] Summary Of Options Outstanding And Options Exercisable Schedule Of Share Based Compensation Value Of Restricted Stock Awards [Table Text Block] Schedule Of Share Based Compensation Value Of Restricted Stock Awards [Table Text Block] Summary Of Value Of Restricted Stock Awards Schedule of Nonvested Share Activity [Table Text Block] Summary Of Nonvested Share Activity Schedule of Defined Benefit Plans Disclosures [Table] Retirement Plan Type [Axis] Retirement Plan Type [Domain] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Pension Plans Defined Benefit [Member] Pension Benefits [Member] Other Postretirement Benefit Plans Defined Benefit [Member] Other Postretirement Benefits [Member] Defined Benefit Plan Disclosure [Line Items] Schedule of Expected Benefit Payments [Table Text Block] Schedule Of Benefit Payments Of Expected Future Service Schedule of Defined Benefit Plans Disclosures [Table Text Block] Schedule Of Changes In Benefit Obligation And Fair Value Of Plan Assets Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Schedule Of Net Liability Recognized On Consolidated Balance Sheets Schedule of Accumulated and Projected Benefit Obligations [Table Text Block] Schedule Of Accumulated And Projected Benefit Obligations Schedule of Net Benefit Costs [Table Text Block] Components Of Net Periodic Benefit Costs Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block] Schedule Of Net Periodic Benefit Cost Not Yet Recognized Schedule of Assumptions Used [Table Text Block] Schedule Of Assumptions Related To Pension And Other Postretirement benefit Plans Schedule of Allocation of Plan Assets [Table Text Block] Schedule Of Fair Value Of Plan Assets Schedule Of Target Asset Allocations [Table Text Block] Schedule Of Target Asset Allocations [Table Text Block] Schedule Of Target Asset Allocations Reconciliation of Revenue from Segments to Consolidated [Text Block] Company's Reportable Segments And Reconciliations To Consolidated Amounts Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Components Of The Company's Cash Paid For Income Taxes Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Regulation Status [Axis] Regulated And Unregulated Operation [Domain] Regulated and Unregulated Operation [Domain] Regulated Operation [Member] Regulated [Member] Statistical Measurement [Axis] Range [Member] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Geographical [Axis] Segment Geographical [Domain] Geographical [Domain] O [H] Ohio [Member] T [X] Texas [Member] Western Pennsylvania [Member] Western Pennsylvania [Member] Western Pennsylvania [Member] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Percentage Of Operating Revenue From Largest Operating Subsidiary Percentage Of Operating Revenue From Largest Operating Subsidiary Percentage of operating revenue from largest operating subsidiary Business combination consideration transferred exchange ratio Business Combination Consideration Transferred Exchange Ratio Business combination consideration transferred exchange ratio Number of counties providing operating services to in Pennsylvania other than north and west of Philadelphia. Number of counties providing operating services Number of counties providing operating services Number Of States Providing Services In Other Than Pennsylvania Number Of States Providing Services In Other Than Pennsylvania Number of states providing services in other than Pennsylvania Number of customers. Number of customers Number of customers Percentage of customers served Percentage of customers served Percent Of Regulated Natural Gas Customers Sold Percent Of Regulated Natural Gas Customers Sold Percent of regulated natural gas customers sold Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments Net utility plant acquisition adjustment Finite-Lived Intangible Asset, Useful Life Amortized Period Public Utilities Property Plant And Equipment Amortization Of Acquisition Adjustments Public Utilities Property Plant And Equipment Amortization Of Acquisition Adjustments Amortization of the acquisition adjustments Capitalized Costs Included In Property Plant And Equipment Capitalized Costs Included In Property Plant And Equipment Utility expenditures expected to be recovered Deferred Costs Deferred cost reported as a component of net property, plant and equipment Public Utilities, Amount of Allowance for Funds Used During Construction, Equity Costs Capitalized Only for Rate-making Purposes Amount of AFUDC related to equity funds Allowance for Funds Used During Construction, Capitalized Interest Capitalized interest Goodwill, Impairment Loss Impaired goodwill Deferred Compensation Plan Assets Deferred compensation plan assets Disposal Group, Including Discontinued Operation, Consideration Consideration for sale of business unit Consideration for sale of business unit Property, Plant and Equipment, Useful Life Useful Lives New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets Adjustment to retained earnings, after tax Revenue from Contract with Customer, Excluding Assessed Tax Revenues from contracts with customers Revenues from contracts with customers Disaggregation of Revenue [Table] Customer [Axis] Name Of Major Customer [Domain] Customer [Domain] Residential [Member] Residential [Member] Residential [Member] Commercial [Member] Commercial [Member] Commercial [Member] Fire Protection [Member] Fire Protection [Member] Fire Protection [Member] Industrial [Member] Industrial [Member] Industrial [Member] Gas Transportation [Member] Gas Transportation [Member] Gas Transportation & Storage [Member] Other Water [Member] Other Water [Member] Other Water [Member] Other Wastewater [Member] Other Wastewater [Member] Other Wastewater [Member] Other Utility [Member] Other Utility [Member] Other Utility [Member] Alternative Revenue Program [Member] Alternative Revenue Program [Member] Alternative Revenue Program [Member] Product and Service [Axis] Products And Services [Domain] Product and Service [Domain] Water [Member] Water [Member] Regulated Water [Member] Wastewater [Member] Wastewater [Member] Wastewater [Member] Natural Gas [Member] Natural Gas [Member] Regulated Natural Gas [Member] Other [Member] Other [Member] Other [Member] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Consolidation Eliminations [Member] Other And Eliminations [Member] Disaggregation of Revenue [Line Items] Schedule of Goodwill [Table] Statement, Business Segments [Axis] Segment [Domain] Segment [Domain] Other Segment [Member] Other Segment [Member] Other Segment [Member] Goodwill [Line Items] Goodwill, Acquired During Period Goodwill acquired during year Reclassification Of Goodwill, Acquisition Adjustment Reclassification Of Goodwill, Acquisition Adjustment Reclassification to utility plant acquisition adjustment Schedule of Business Acquisitions, by Acquisition [Table] Wastewater Utility Systems In Various States [Member] Wastewater Utility Systems In Various States [Member] Water And Wastewater Utility Systems [Member] D [E] Delaware [Member] Business Acquisition [Axis] Business Acquisition Acquiree [Domain] Business Acquisition, Acquiree [Domain] Greenville Sanitary Authority’s Wastewater Utility Assets [Member] Greenville Sanitary Authoritys Wastewater Utility Assets [Member] Greenville Sanitary Authority’s Wastewater Utility Assets [Member] Village of Midvale, Ohio’s water system [Member] Village Of Midvale Ohios Water System [Member] Village of Midvale, Ohio’s water system [Member] Integra Water Texas, LLC [Member] Integra Water Texas Llc [Member] Integra Water Texas, LLC [Member] wastewater utility assets in Morgan County Member Wastewater Utility Assets In Morgan County [Member] Wastewater Utility Assets in Morgan County [Member] Shenandoah Borough [Member] Shenandoah Borough [Member] Shenandoah Borough [Member] La Rue [Member] La Rue [Member] La Rue [Member] Southern Oaks Water System Southern Oaks Water System [Member] Southern Oaks Water System [Member] Village of Frankfort [Member] Village Of Frankfort [Member] Village of Frankfort [Member] Union Rome [Member] Union Rome [Member] Union Rome [Member] North Heidelberg Sewer Company North Heidelberg Sewer Company [Member] North Heidelberg Sewer Company [Member] Water And Wastewater Utility Systems Member Water And Wastewater Utility Systems [Member] Water And Wastewater Utility Systems [Member] Wastewater Utility Assets Of Westfield HOA [Member] Wastewater Utility Assets Of Westfield Hoa [Member] Wastewater Utility Assets Of Westfield HOA [Member] Wastewater Utility System [Member] Wastewater Utility System [Member] Wastewater Utility System [Member] Private Water And Wastewater Utility Assets [Member] Private Water And Wastewater Utility Assets [Member] Private Water And Wastewater Utility Assets [Member] Acquisition 2023 [Member] Acquisition2023 [Member] Acquisition 2023 [Member] Acquisition 2024 [Member] Acquisition2024 [Member] Acquisition 2024 [Member] Acquisition 2025 [Member] Acquisition2025 [Member] Acquisition 2025 [Member] Business Acquisition [Line Items] Number of Dwelling Units Number Of Dwelling Units Number of dwelling units Business Acquisition, Cost of Acquired Entity, Cash Paid Cash paid for business acquisition Business Acquisition, Pro Forma Revenue Operating revenues Number Of Retail Customers Number Of Retail Customers Retail customers Business Acquisition, Geographical Location, Number Of Municipalities Business Acquisition, Geographical Location, Number Of Municipalities Number of municipalities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Property, plant and equipment, net Debt Instrument, Maturity Date Maturity Business Combination, Consideration Transferred Total purchase price Disposition [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Disposal Group Not Discontinued Operations [Member] Disposal Group, Not Discontinued Operations [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Proceeds from Sale of Productive Assets Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Gain on sale Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration] Schedule of Property, Plant and Equipment [Table] Weighted Average [Member] Weighted Average [Member] Long-Lived Tangible Asset [Axis] Property Plant And Equipment Type [Domain] Property, Plant and Equipment, Type [Domain] Mains And Accessories [Member] Mains And Accessories [Member] Mains And Accessories [Member] Services, Hydrants, Treatment Plants And Reservoirs [Member] Services Hydrants Treatment Plants And Reservoirs [Member] Services, Hydrants, Treatment Plants And Reservoirs [Member] Operations structures and water tanks [Member] Operations Structures And Water Tanks [Member] Operations Structures And Water Tanks [Member] Miscellaneous Pumping And Purification Equipment [Member] Miscellaneous Pumping And Purification Equipment [Member] Miscellaneous Pumping And Purification Equipment [Member] Natural Gas Transmission [Member] Natural Gas Transmission [Member] Natural Gas Transmission [Member] Natural Gas Storage, PPE [Member] Natural Gas Storage Ppe [Member] Natural Gas Storage [Member] Natural Gas Gathering And Processing [Member] Natural Gas Gathering And Processing [Member] Natural Gas Gathering And Processing [Member] Natural Gas Distribution [Member] Natural Gas Distribution [Member] Natural Gas Distribution [Member] Meters, Data Processing, Transportation And Operating Equipment [Member] Meters Data Processing Transportation And Operating Equipment [Member] Meters, Transportation And Operating Equipment [Member] Land [Member] Land And Other Non-Depreciable Assets [Member] Utility Plant And Equipment [Member] Utility Plant And Equipment [Member] Utility Plant And Equipment [Member] Construction In Progress [Member] Utility Construction Work In progress [Member] Net Utility Plant Acquisition Adjustment [Member] Net Utility Plant Acquisition Adjustment [Member] Net Utility Plant Acquisition Adjustment [Member] Non Utility Plant And Equipment [Member] Non Utility Plant And Equipment [Member] Non-Utility Plant And Equipment [Member] Property, Plant and Equipment [Line Items] Public Utilities, Property, Plant and Equipment, Equipment Utility plant and equipment Public Utilities, Property, Plant and Equipment, Construction Work in Progress Utility construction work in progress Non-utility plant and equipment Non-Utility Plant And Equipment Non-utility plant and equipment Schedule of Accounts, Notes, Loans and Financing Receivable [Table] P [A] Pennsylvania [Member] N [C] North Carolina [Member] I [L] Illinois [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Utility Customers By Geographic Operating Segment, Percentage Utility Customers By Geographic Operating Segment, Percentage Utility customers by geographic operating segment, percentage Number Of Customers Who Accounted For More Than 1% Of Operating Revenues Number Of Customers Who Accounted For More Than 1% Of Operating Revenues Number of customers who accounted for more than 1% of operating revenues Billed Contracts Receivable Billed utility revenue Other Receivables Other Accounts Receivable, Gross Gross accounts receivable Allowance for Doubtful Accounts Receivable Balance at December 31 Balance at January 1 Less allowance for doubtful accounts Accounts Receivable After Allowance For Doubtful Accounts Net accounts receivable Premiums Receivable, Allowance for Doubtful Accounts, Provision Charged to Expense Amounts charged to expense Premiums Receivable, Allowance for Doubtful Accounts, Write Offs Against Allowance Accounts written off Premiums Receivable, Allowance for Doubtful Accounts, Recoveries Recoveries of accounts written off and other Regulatory Assets And Liabilities [Table] Regulatory Assets And Liabilities [Table] Regulatory Assets And Liabilities [Line Items] Regulatory Assets And Liabilities [Line Items] Litigation Settlement, Amount Awarded to Other Party Lawsuit settlement proceeds Regulatory Asset Recovery Period Regulatory Asset Recovery Period Regulatory asset recovery period Regulatory Order, Refund, Catch-Up Adjustment Period Regulatory Order, Refund, Catch-Up Adjustment Period Regulatory order, refund, catch-up adjustment period Regulatory Order, Refund, Extended Period Regulatory Order, Refund, Extended Period Regulatory order, refund, extended period Water tank painting costs amortized over a period. Water Tank Painting Costs Amortized Over A Period Water tank painting costs amortization period Amortizataion period of rate case filing expense Amortizataion period of rate case filing expense Rate case filing expense amortization period Repayments of long-term debt Debt redeemed Payment for Debt Extinguishment or Debt Prepayment Cost Make whole payment Debt Instrument, Redemption Price, Percentage Redemption percentage Schedule Of Regulatory Assets And Liabilities [Table] Schedule Of Regulatory Assets And Liabilities [Table] Regulatory Asset [Axis] Regulatory Asset [Domain] Regulatory Asset [Domain] Deferred Income Tax Charges [Member] Income Taxes [Member] Purchased Gas Costs [Member] Purchased Gas Costs [Member] Purchased Gas Costs [Member] Asset Retirement Obligation Costs [Member] Utility Plant Retirement Costs [Member] Postretirement Benefit Costs [Member] Postretirement Benefits [Member] Recoverable Vacation Pay [Member] Accrued Vacation [Member] Water Tank Painting [Member] Water Tank Painting [Member] Water Tank Painting [Member] Fair Value Adjustment Of Long-Term Debt Assumed In Acquisition [Member] Fair Value Adjustment Of Long Term Debt Assumed In Acquisition [Member] Fair Value Adjustment Of Long-Term Debt Assumed In Acquisition [Member] Debt Refinancing [Member] Debt Refinancing [Member] Debt Refinancing [Member] Rate Case Filing Expenses And Other [Member] Rate Case Filing Expenses And Other [Member] Rate Case Filing Expenses And Other [Member] Regulatory Of Assets And Liabilities [Line Items] Regulatory Of Assets And Liabilities [Line Items] Regulatory Assets Regulatory Liabilities Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Convertible Debt Principal amount of convertible note Investment Interest Rate Investment interest rate Loan fee receivable Loan fee receivable Loan fee receivable Investment Maturity Date Maturity date Payments to Acquire Debt Securities, Available-for-Sale Payment to acquire of convertible notes Received reimbursement of the deposit paid to the gas turbine manufacturer Received Reimbursement Of The Deposit Paid To The Gas Turbine Manufacturer Received reimbursement of the deposit paid to the gas turbine manufacturer Debt Securities, Available-for-Sale Fair Value Convertible Note Investment Debt Securities, Available-for-Sale, Noncurrent Convertible note investment, noncurrent Debt Securities, Available-for-Sale, Amortized Cost Cost Debt Securities, Available-for-Sale, Unrealized Gain (Loss) Unrealized Gains (Losses) Income Tax Authority [Table] Income Tax Authority [Table] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Internal Revenue Service I R S [Member] Federal [Member] State And Local Jurisdiction [Member] State [Member] Income Taxes [Line Items] Income Taxes [Line Items] Effective Income Tax Rate, Continuing Operations Effective income tax rate Actual income tax expense, Percent Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Percent State corporate net income tax rates Operating loss carryforwards Operating Loss Carryforwards, Valuation Allowance Operating loss carryforwards, valuation allowance Deferred Tax Assets, Operating Loss Carryforwards, Domestic Deferred tax assets operating loss carryforward Income Tax Examination, Penalties and Interest Expense Interest and penalties expense Other Tax Expense (Benefit) Net income tax benefits Income Tax Examination, Penalties and Interest Accrued Interest and penalties accrued Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Corporate federal income tax rate US Federal Statutory Tax Rate, Percent Valuation allowance for state deferred tax assets Valuation Allowance For State Deferred Tax Assets Valuation allowance for state deferred tax assets Cumulative state valuation allowance Cumulative State Valuation Allowance Cumulative state valuation allowance Balance at March 31 Balance at March 31, Balance at December 31, Unrecognized tax benefits Operating loss carryforwards before unrecognized tax position Operating Loss Carryforwards Before Unrecognized Tax Position Operating loss carryforwards before unrecognized tax position Cumulative Federal charitable contribution amount Cumulative Federal Charitable Contribution Cumulative Federal charitable contribution amount Cumulative Federal charitable contribution valuation allowance Cumulative Federal Charitable Contribution Valuation Allowance Cumulative Federal charitable contribution valuation allowance Cumulative state charitable contribution valuation allowance Cumulative State Charitable Contribution Valuation Allowance Cumulative state charitable contribution valuation allowance Cumulative state charitable contribution Cumulative State Charitable Contribution Cumulative state charitable contribution Expected tax benefit from accounting method change Expected Tax Benefit From Accounting Method Change Expected tax benefit from accounting method change Expected tax benefit from accounting method change, refund period Expected Tax Benefit From Accounting Method Change, Refund Period Expected tax benefit from accounting method change, refund period Amortization period for tax repairs surcredit Amortization Period For Tax Repairs Surcredit Amortization period for tax repairs surcredit Income Taxes [Table] Income Taxes [Table] Current: Current Federal Tax Expense (Benefit) Federal Current State and Local Tax Expense (Benefit) State Current Income Tax Expense (Benefit) Total current income taxes Deferred: Deferred Federal Income Tax Expense (Benefit) Federal Deferred State and Local Income Tax Expense (Benefit) State Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount US Federal Statutory Tax Rate, Amount Income Tax Reconciliation, State and Local Income Taxes State and local income taxes, net of Federal income tax effect, Amount Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Change in valuation allowance, Amount Income Tax Reconciliation Plant Basis Differences Income Tax Reconciliation Plant Basis Differences Plant basis differences, Amount Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Amortization of excess deferred income taxes, Amount Income Tax Reconciliation Release Of Income Tax Reserve Regulatory Liability Income Tax Reconciliation Release Of Income Tax Reserve Regulatory Liability Release of income tax reserve regulatory liability, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount Nontaxable or nondeductible items, Amount Changes in unrecognized tax benefits Income Tax Reconciliation Changes In Unrecognized Tax Benefits, Amount Changes in unrecognized tax benefits, Amount Federal Income Tax Expense (Benefit), Continuing Operations Computed Federal tax expense at statutory rate, Amount Income tax reconciliation decrease in federal tax expense related to the flow through benefit of repair deductions, Amount Income Tax Reconciliation Decrease In Federal Tax Expense Related To The Flow Through Benefit Of Repair Deductions Decrease in Federal tax expense related to the flow through benefit of repair deductions, Amount Income Tax Reconciliation, Amortization Of Deferred Benefit From Repair Method Changes Income Tax Reconciliation, Amortization Of Deferred Benefit From Repair Method Changes Amortization of deferred benefit from repair method changes, Amount Income Tax Reconciliation, Net Change In Unrecognized Tax Benefit Income Tax Reconciliation, Net Change In Unrecognized Tax Benefit Net change in unrecognized tax benefit, Amount Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Other, Amount Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent State and local income taxes, net of Federal income tax effect, Percent Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Change in valuation allowance, Percent Effective Income Tax Rate Reconciliation Plant Basis Difference Effective Income Tax Rate Reconciliation Plant Basis Difference Plant basis differences, Percent Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Amortization of excess deferred income taxes, Percent Income Tax Rate Reconciliation Release Of Income Tax Reserve Regulatory Liability Income Tax Rate Reconciliation Release Of Income Tax Reserve Regulatory Liability Release of income tax reserve regulatory liability, Percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Nontaxable or nondeductible items, Percent Income Tax Rate Reconciliation Changes In Unrecognized Tax Benefits Income Tax Rate Reconciliation Changes In Unrecognized Tax Benefits Changes in unrecognized tax benefits, Percent Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Other, Percent Unrecognized Tax Benefits, Increase (Decrease) Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Increase (Decrease) Resulting from Current Period Tax Positions Impact of current year activity Unrecognized Tax Benefits, Change In Enacted Tax Rate Unrecognized Tax Benefits, Change In Enacted Tax Rate Effect of Pennsylvania tax rate change Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Decrease for prior year tax positions Deferred Tax Assets, Other Loss Carryforwards Tax attributes and credit carryforwards Deferred Tax Assets Tax Effect Of Regulatory Asset For Postretirement Benefits Deferred Tax Assets Tax Effect Of Regulatory Asset For Postretirement Benefits Tax effect of regulatory liabilities for post-retirement benefits Deferred tax assets, costs expensed for book not deducted for tax, principally accrued expenses Deferred Tax Assets, Costs Expensed For Book Not Deducted For Tax, Principally Accrued Expenses Costs expensed for book not deducted for tax, principally accrued expenses Deferred tax assets, customers’ advances for construction Deferred Tax Assets, Customers’ Advances For Construction Customers’ advances for construction Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Deferred Rent Operating lease liabilities Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits Post-retirement benefits Deferred Tax Assets, Other Other Deferred Tax Assets, Gross Total gross deferred tax assets Deferred Tax Assets, Valuation Allowance Less valuation allowance Balance at December 31, Balance at January 1, Deferred Tax Assets, Net Net deferred tax assets Deferred tax liabilities, utility plant, principally due to depreciation and differences in the basis of fixed assets due to variation in tax and book accounting Deferred Tax Liabilities, Utility Plant, Principally Due To Depreciation And Differences In The Basis Of Fixed Assets Due To Variation In Tax And Book Accounting Utility plant, principally due to depreciation and differences in the basis of fixed assets due to variation in tax and book accounting Deferred tax liabilities, deferred taxes associated with the gross-up of revenues necessary to recover, in rates, the effect of temporary differences Deferred Tax Liabilities, Deferred Taxes Associated With The Gross-Up Of Revenues Necessary To Recover, In Rates, The Effect Of Temporary Differences Deferred taxes associated with the gross-up of revenues necessary to recover the effect of temporary differences in rates Deferred Tax Liabilities, Tax Effect Of Regulatory Liabilities For Post-Retirement Benefits Deferred Tax Liabilities, Tax Effect Of Regulatory Liabilities For Post-Retirement Benefits Tax effect of regulatory assets for post-retirement benefits Deferred Tax Liabilities, Leasing Arrangements Operating lease right-of-use assets Deferred tax liabilities, deferred investment tax credit Deferred Tax Liabilities, Deferred Investment Tax Credit Deferred investment tax credit Deferred tax liabilities, tax effect of regulatory asset for postretirement benefits Deferred Tax Liabilities, Tax Effect Of Regulatory Asset For Postretirement Benefits Post-retirement benefits Deferred Tax Liabilities, Gross Deferred Tax Liabilities, Gross, Total Net deferred tax liability Net deferred tax liability Valuation Allowance, Deferred Tax Asset, Amounts Charged To Expense Valuation Allowance, Deferred Tax Asset, Amounts Charged To Expense Amounts charged to expense Valuation Allowance, Deferred Tax Asset, Amounts Charged To Other Accounts Valuation Allowance, Deferred Tax Asset, Amounts Charged To Other Accounts Amounts charged to regulatory assets Property Taxes Property Taxes Property Gross Receipts, Excise And Franchise Tax Gross Receipts, Excise And Franchise Tax Gross receipts, excise and franchise Payroll Tax Payroll Tax Payroll Regulatory assessments tax Regulatory Assessments Tax Regulatory assessments tax Pump Taxes Pumping fees Other Components Of Tax Other Components Of Tax Other Commitments And Contingencies [Table] Commitments And Contingencies [Table] Other Water And Wastewater Subsidiaries [Member] Other Water And Wastewater Subsidiaries [Member] Other Water And Wastewater Subsidiaries [Member] Virginia Water And Wastewater Subsidiaries [Member] Virginia Water And Wastewater Subsidiaries [Member] Virginia Water And Wastewater Subsidiaries [Member] American Water [Member] American Water [Member] American Water [Member] Estimated Annual Commitments To Purchase Water Through The Next Five Years Estimated Annual Commitments To Purchase Water Through The Next Five Years Estimated annual commitments to purchase water through the next five years Investment Advisory Fee Advisory fee to be paid Business Combination Advisor Termination Fee Percentage Of Compensation Business Combination Advisor Termination Fee Percentage Of Compensation Advisor termination fee percentage of compensation payable to company if merger fails Payments for Merger Related Costs Transaction fee Insurance Recoveries Insurance proceeds for a portion of expense incurred by company Aggregate long term water purchase commitment, remaining years. Long Term Purchase Aggregate Commitment, Remaining Years Aggregate amount of the commitments for the remaining years Purchase Obligation Term Purchase Obligation Term Estimated Insurance Recoveries Amount probable of recovery through insurance Contingent liability for self-insured employee medical benefit program Contingent liability for self-insured employee medical benefit program Recorded Unconditional Purchase Obligation, to be Paid, Year One Through Five Recorded Unconditional Purchase Obligation, to be Paid, Year One Through Five Estimated commitments through 2027 Recorded Unconditional Purchase Obligation Due after Fifth Year Thereafter Proceeds from Insurance Settlement, Operating Activities Insurance proceeds Loss Contingency Accrual Litigation Settlement, Fee Expense Claim expense Recorded Unconditional Purchase Obligation Due within One Year 2026 Recorded Unconditional Purchase Obligation Due in Second Year 2027 Recorded Unconditional Purchase Obligation Due in Third Year 2028 Recorded Unconditional Purchase Obligation Due in Fourth Year 2029 Recorded Unconditional Purchase Obligation Due in Fifth Year 2030 Long Term Purchase Agreement Long Term Purchase Agreement Purchased water under long-term agreements Purchased water under long-term agreements. Purchased Water Under Long-Term Agreements Water treatment expense under contractual agreement Water treatment expense under contractual agreement. Water Treatment Expense Under Contractual Agreement Purchased natural gas under long-term agreements Lessee, Operating Lease, Term of Contract Lease term Lessee, Operating Lease, Renewal Term Renewal term Operating Lease, Cost Operating lease cost Operating Lease, Payments Operating cash flows from operating leases Operating Lease, Liability, Current Other accrued liabilities Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Operating Lease, Liability Total operating lease liabilities Less operating lease liabilities Operating Lease, Weighted Average Remaining Lease Term Weighted average remaining lease term Operating Lease, Weighted Average Discount Rate, Percent Weighted average remaining lease term Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months 2026 Lessee, Operating Lease, Liability, Payments, Due Year Two 2027 Lessee, Operating Lease, Liability, Payments, Due Year Three 2028 Lessee, Operating Lease, Liability, Payments, Due Year Four 2029 Lessee, Operating Lease, Liability, Payments, Due Year Five 2030 Lessee, Operating Lease, Liability, Payments, Due after Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due Total operating lease payments Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value adjustment Schedule of Long-term Debt Instruments [Table] Related Party [Axis] Related Party [Domain] Related Party [Domain] Aqua Pennsylvania, Inc [Member] Aqua Pennsylvania Inc [Member] Aqua Pennsylvania, Inc [Member] Debt Instrument [Axis] Debt Instrument Name [Domain] Debt Instrument, Name [Domain] Swing Line Commitment Member Swing Line Commitment [Member] Swing Line Commitment [Member] Unsecured Revolving Credit Facility With Four Banks [Member] Unsecured Revolving Credit Facility With Four Banks [Member] Unsecured Revolving Credit Facility With Four Banks [Member] Peoples Natural Gas Companies Revolving Credit [Member] Peoples Natural Gas Companies Revolving Credit [Member] Peoples Natural Gas Companies Revolving Credit [Member] First Mortgage Bonds [Member] First Mortgage Bonds [Member] First Mortgage Bonds [Member] Senior Notes Maturity Year B [Member] Senior Notes Maturity Year B [Member] Notes At 5.375% Due 2034 [Member] Senior Notes Maturity Year F [Member] Senior Notes Maturity Year F [Member] Notes At 4.80% Due 2027 [Member] Legal Entity [Axis] Entity [Domain] Entity [Domain] Aqua Pennsylvanias [Member] Aqua Pennsylvanias [Member] Aqua Pennsylvania's [Member] Other Subsidiaries [Member] Other Subsidiaries [Member] Other Subsidiaries [Member] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Letter Of Credit [Member] Letter of Credit [Member] Debt Instrument [Line Items] Retained earnings included in non controlling interest Retained Earnings Included In Non Controlling Interest Aqua Pennsylvania retained earning excluding minority interest Proceeds from Issuance of Senior Long-Term Debt Proceeds from issuance of senior notes Debt Issuance Costs, Net Less expense on issuance of notes Other Restricted Assets Restricted assets Face Amount Debt instrument, issued Principal amount of convertible note Debt Instrument, Unamortized Discount Net of unamortized discount on issuance Debt, Weighted Average Interest Rate Weighted average interest rate Net Amount at Risk by Product and Guarantee, Weighted Average Period Remaining Weighted average remaining term Payments Of Warrant Issuance Costs Debt issuance expense Debt issuance costs Line of Credit Facility, Maximum Borrowing Capacity Borrowing capacity Debt term Term of debt Debt Intrument Maturity Year Debt Intrument Maturity Year Debt maturity Maturity Long-term Debt, Weighted Average Interest Rate Weighted average cost of long-term debt Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate Weighted average cost of fixed rate long-term debt Sublimit For Daily Demand Loans Sublimit For Daily Demand Loans Sublimit for daily demand loans Available Barrowing Capacity Credit Sublimit Available Barrowing Capacity Credit Sublimit Available barrowing capacity credit sublimit Line of Credit Facility, Current Borrowing Capacity Line of credit Available capacity borrowed Line of Credit Facility, Interest Rate During Period Average borrowings cost percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Commitment fee percentage Line of Credit Facility, Maximum Month-end Outstanding Amount Maximum amount outstanding at the end of any one month Line of Credit Facility, Average Outstanding Amount Average borrowing amount Interest Income (Expense), Net Interest income Interest Expense, Debt Interest cost Interest Costs, Capitalized During Period Capitalized amount Line of Credit Facility, Commitment Fee Percentage Commitment fee Long Term Debt Interest Rate Range Zero Point Zero Zero Percentage To Zero Point Nine Nine Percentage [Member] Long Term Debt Interest Rate Range Zero Point Zero Zero Percentage To Zero Point Nine Nine Percentage [Member] Long-Term Debt Interest Rate Range 0.00% To 0.99% [Member] Long Term Debt Interest Rate Range One Point Zero Zero Percentage To One Point Nine Nine Percentage [Member] Long Term Debt Interest Rate Range One Point Zero Zero Percentage To One Point Nine Nine Percentage [Member] Long-Term Debt Interest Rate Range 1.00% To 1.99% [Member] Long Term Debt Interest Rate Range Two Point Zero Zero Percentage To Two Point Nine Nine Percentage [Member] Long Term Debt Interest Rate Range Two Point Zero Zero Percentage To Two Point Nine Nine Percentage [Member] Long-Term Debt Interest Rate Range 2.00% To 2.99% [Member] Long Term Debt Interest Rate Range Three Point Zero Zero Percentage To Three Point Nine Nine Percentage [Member] Long Term Debt Interest Rate Range Three Point Zero Zero Percentage To Three Point Nine Nine Percentage [Member] Long-Term Debt Interest Rate Range 3.00% To 3.99% [Member] Long Term Debt Interest Rate Range Four Point Zero Zero Percentage To Four Point Nine Nine Percentage [Member] Long Term Debt Interest Rate Range Four Point Zero Zero Percentage To Four Point Nine Nine Percentage [Member] Long-Term Debt Interest Rate Range 4.00% To 4.99% [Member] Long Term Debt Interest Rate Range Five Point Zero Zero Percentage To Five Point Nine Nine Percentage [Member] Long Term Debt Interest Rate Range Five Point Zero Zero Percentage To Five Point Nine Nine Percentage [Member] Long-Term Debt Interest Rate Range 5.00% To 5.99% [Member] Long Term Debt Interest Rate Range Six Point Zero Zero Percentage To Six Point Nine Nine Percentage [Member] Long Term Debt Interest Rate Range Six Point Zero Zero Percentage To Six Point Nine Nine Percentage [Member] Long-Term Debt Interest Rate Range 6.00% To 6.99% [Member] Long Term Debt Interest Rate Range Seven Point Zero Zero Percentage To Seven Point Nine Nine Percentage [Member] Long Term Debt Interest Rate Range Seven Point Zero Zero Percentage To Seven Point Nine Nine Percentage [Member] Long-Term Debt Interest Rate Range 7.00% To 7.99% [Member] Long Term Debt Interest Rate Range Eight Point Zero Zero Percentage To Eight Point Nine Nine Percentage [Member] Long Term Debt Interest Rate Range Eight Point Zero Zero Percentage To Eight Point Nine Nine Percentage [Member] Long-Term Debt Interest Rate Range 8.00% To 8.99% [Member] Long Term Debt Interest Rate Range Nine Point Zero Zero Percentage To Nine Point Nine Nine Percentage [Member] Long Term Debt Interest Rate Range Nine Point Zero Zero Percentage To Nine Point Nine Nine Percentage [Member] Long-Term Debt Interest Rate Range 9.00% To 9.99% [Member] Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2026 Long-term Debt, Maturities, Repayments of Principal in Year Two 2027 Long-term Debt, Maturities, Repayments of Principal in Year Three 2028 Long-term Debt, Maturities, Repayments of Principal in Year Four 2029 Long-term Debt, Maturities, Repayments of Principal in Year Five 2030 Long-term Debt, Maturities, Repayments of Principal after Year Five Thereafter Fair Value, by Balance Sheet Grouping [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Fair Value Inputs Level1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Loans Payable, Fair Value Disclosure Loans payable Investments, Fair Value Disclosure Mutual funds Equity Securities, FV-NI, Gain (Loss) Net gain (loss) recognized during the period on equity securities Equity Securities, FV-NI, Realized Gain (Loss) Less: net gain (loss) recognized during the period on equity securities sold during the period Equity Securities, FV-NI, Unrealized Gain (Loss) Unrealized gain (loss) recognized during the reporting period on equity securities still held at the reporting date Measurement Basis [Axis] Portion At Fair Value Fair Value Disclosure [Member] Portion at Fair Value Measurement [Member] Carrying Reported Amount Fair Value Disclosure [Member] Carrying Amount [Member] Estimate Of Fair Value Fair Value Disclosure [Member] Estimated Fair Value [Member] Long Term Debt Fair Value Long-term debt Class of Treasury Stock [Table] Equity, Class of Treasury Stock [Line Items] Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Par or Stated Value Per Share Preferred stock, par value Dividends Payable, Amount Per Share Dividend payable quarterly, per share Dividends Payable, Date Declared Dividends payable, date declared Dividends Payable, Date of Record Dividends payable, date of record Dividends Payable, Date to be Paid Dividends payable, date to be paid Dividends Payable Dividends payable Aggregate Common And Preferred Shares Authorized Value Aggregate Common And Preferred Shares Authorized Value Common and preferred shares authorized Sale Of Stock, Shares Issuance of common stock under dividend reinvestment plan (22,170 shares) Common stock issued Stock Remaining Available For Sale, Amount Stock Remaining Available For Sale, Amount Stock remaining available for sale, amount Common stock shares future issuance and sale at aggregate offering price Common Stock Shares Future Issuance And Sale At Aggregate Offering Price Common stock shares future issuance and sale at aggregate offering price Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date Direct Stock Purchase Plan discount from current market value Business Combination, Shares Available For Issuance Business Combination, Shares Available For Issuance Shares available for issuance under acquisition shelf registration Shares, Outstanding Shares outstanding Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Employee stock options excluded from calculations of diluted net income per share Effect of dilutive securities: Incremental Common Shares Attributable to Share-based Payment Arrangements Employee stock-based compensation Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] The Plan [Member] Plan [Member] The Plan [Member] Equity Compensation, 2004 Plan [Member] Equity Compensation2004 Plan [Member] 2004 Plan [Member] Vesting [Axis] Vesting [Domain] Vesting [Domain] Share Based Compensation Award Tranche One [Member] Share-based Payment Arrangement, Tranche One [Member] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Number of shares authorized for issuance Share Based Compensation Arrangement By Share Based Payment Award Maximum Number Of Shares Available For Issuance May Be Issued As Restricted Stock Share Based Compensation Arrangement By Share Based Payment Award Maximum Number Of Shares Available For Issuance May Be Issued As Restricted Stock Maximum number of shares available for issuance may be issued as restricted stock Share-based Compensation Arrangement by Share-based Payment Award, Maximum Shares Per Employee Maximum number of shares subject to grants to any one individual in any one year Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Still Available For Issuance Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Still Available For Issuance Number of shares still available for issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Shares available for issuance Performance Period Specified In Grant Performance Period Specified In Grant Performance period specified in grant, in years Percentage of target award amount the participant may earn Percentage Of Target Award Amount The Participant May Earn Percentage of target award amount the grantee may earn Share based compensation arrangement by share based payment award amortization period of fair value of shares Share based compensation arrangement by share based payment award Amortization Period Of Fair Value of Shares Amortization period of fair value of shares, in months Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Unrecognized compensation costs Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Period over which unrecognized compensation cost will be recognized Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period, in years Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Vesting percentage Public Utilities, Requested Return on Equity, Percentage Return on equity Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Total Intrinsic Value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Total Intrinsic Value Aggregate intrinsic value Share Based Compensation, Performance Goals, Metrics 1 Share Based Compensation, Performance Goals, Metrics 1 Metric 1 Share Based Compensation, Performance Goals, Metrics 2 Share Based Compensation, Performance Goals, Metrics 2 Metric 2 Share Based Compensation, Performance Goals, Metrics 3 Share Based Compensation, Performance Goals, Metrics 3 Metric 3 Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost Stock-based compensation within operations and maintenance expenses Matching contribution, annual profit sharing compensation expense Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Income tax benefit Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Nonvested share units at end of period, Number of Share Units Nonvested share units at beginning of period, Number of Share Units Share based compensation arrangement by share based payment award equity instruments other than options performance criteria adjustment Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Performance Criteria Adjustment Performance criteria adjustment, Number of Share Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Forfeited, Number of Share Units Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Share units issued, Number of Share Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Nonvested share units at end of period, Weighted Average Fair Value Nonvested share units at beginning of period, Weighted Average Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Granted, Weighted Average Fair Value Weighted average fair value of stock awards granted Share based compensation arrangement by share based payment award equity instruments other than options performance criteria adjustment, weighted average grant date fair value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Performance Criteria Adjustment, Weighted Average Grant Date Fair Value Performance criteria adjustment, Weighted Average Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value Forfeited, Weighted Average Fair Value Share based compensation arrangement by share based payment award shares issued in Period, weighted average grant date fair value Share Based Compensation Arrangement By Share Based Payment Award Shares Issued In Period, Weighted Average Grant Date Fair Value Share units issued, Weighted Average Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected term (years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility Share based compensation arrangement by share based payment award fair value assumptions grant date fair value per option Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Grant Date Fair Value Per Option Grant date fair value Share-Based Compensation Arrangement By Share-Based Payment Award Fair Value Assumptions Intrinsic Value Of Vested Shares Share-Based Compensation Arrangement By Share-Based Payment Award Fair Value Assumptions Intrinsic Value Of Vested Shares Intrinsic value of vested PSUs Intrinsic value of vested RSUs Share-Based Compensation Arrangement By Share-Based Payment Award Fair Value Assumptions Fair Value Of Vested Shares Share-Based Compensation Arrangement By Share-Based Payment Award Fair Value Assumptions Fair Value Of Vested Shares Fair value of vested PSUs Fair value of vested RSUs Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Stock units vested, Number of Share Units Vested, number of shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Stock units vested, Weighted Average Fair Value Vested, Weighted Average Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Outstanding at end of period, Shares Outstanding at beginning of period, Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Granted, Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Forfeited, Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Expired / Cancelled, Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Exercisable at end of period, Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Outstanding at end of period, Weighted Average Exercise Price Outstanding at beginning of period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Granted, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Forfeited, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Expired / Cancelled, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Exercised, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Exercisable at end of period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Outstanding at end of period, Weighted Average Remaining Life (years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Exercisable at end of period, Weighted Average Remaining Life (years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Outstanding at end of period, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Exercisable at end of period, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value Intrinsic value of options exercised Share based compensation arrangement by share based payment award options vested period total fair value Share Based Compensation Arrangement By Share Based Payment Award Options Vested Period Total Fair Value Fair value of options vested Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Exercise Price Range [Axis] Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Range Of Prices, A [Member] Range Of Prices [Member] $30.00 - 33.99 [Member] Range Of Prices, B [Member] Range Of Prices B [Member] $34.00 - 34.99 [Member] Range Of Prices, Seventeen To Nineteen Point Nine Nine [Member] Range Of Prices Seventeen To Nineteen Point Nine Nine [Member] $35.00 - 35.99 [Member] Range Of Prices, C [Member] Range Of Prices C [Member] $36.00 and above [Member] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Range of prices, Lower limit Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Range of prices, Upper limit Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Options Outstanding, Shares Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term Options Outstanding, Weighted Average Remaining Life Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price, Beginning Balance Options Outstanding, Weighted Average Exercise Price Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Options Exercisable, Shares Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Options Exercisable, Weighted Average Exercise Price Share based compensation arrangement by share based payment award equity instruments other than options vested in period total intrinsic value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Intrinsic Value Intrinsic value of restricted stock awards vested Defined Benefit Plan, Plan Assets, Category [Axis] Plan Asset Categories [Domain] Plan Asset Categories [Domain] Aqua America Common Stock [Member] Aqua America Common Stock [Member] Aqua America Common Stock [Member] Defined Benefit Plan, Special Termination Benefits Lump sum paid Defined Benefit Plan, Fair Value of Plan Assets Fair value of plan assets Fair value of plan assets at December 31 Fair value of plan assets at January 1 Total assets Defined Benefit Plan Fair Value Percentage Of Plan Assets Defined Benefit Plan Fair Value Percentage Of Plan Assets Percentage of plan assets Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year 2024 expected contribution Consideration Paid To Insurance Carrier Consideration Paid To Insurance Carrier Consideration paid to insurance carrier Settlement gain recorded as regulatory liability. Settlement Gain Recorded As Regulatory Liability Settlement gain recorded as regulatory liability Liability, Defined Benefit Pension Plan, Current Total obligation of non-qualified supplemental pension benefit plan Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months 2026 Defined Benefit Plan, Expected Future Benefit Payments, Year Two 2027 Defined Benefit Plan, Expected Future Benefit Payments, Year Three 2028 Defined Benefit Plan, Expected Future Benefit Payments, Year Four 2029 Defined Benefit Plan, Expected Future Benefit Payments, Year Five 2030 Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter 2031-2035 Change in benefit obligation: Defined Benefit Plan, Benefit Obligation Benefit obligation at December 31 Benefit obligation at January 1 Defined Benefit Plan, Service Cost Service cost Defined Benefit Plan, Interest Cost Interest cost Actuarial loss Actuarial loss/(gain) Defined Benefit Plan, Contributions by Plan Participants Plan participants' contributions Defined Benefit Plan, Benefits Paid Benefits paid Defined Benefit Plan, Plan Amendments Plan amendments Curtailment Loss Curtailments Defined Benefit Plan, Settlements, Benefit Obligation Settlements Change in plan assets: Defined Benefit Plan, Actual Return on Plan Assets Actual return on plan assets Defined Benefit Plan, Contributions by Employer Employer contributions Defined Benefit Plan, Plan Assets, Contributions by Plan Participant Participants' contributions Defined Benefit Plan, Benefits Paid, Plan Assets Defined Benefit Plan, Benefits Paid, Plan Assets Benefits paid Defined Benefit Plan, Plan Assets, Payment for Settlement Settlements Funded status of plan: Defined Benefit Plan, Funded Status of Plan Net asset / (liability) recognized at December 31, Assets for Plan Benefits, Defined Benefit Plan Non-Current Asset Pension and Other Postretirement Defined Benefit Plans, Current Liabilities Current liability Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Noncurrent liability Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position Net asset / (liability) recognized Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Projected Benefit Obligation Projected benefit obligation Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation Accumulated benefit obligation Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets Fair value of plan assets Defined Benefit Plan, Expected Return on Plan Assets Expected return on plan assets Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Amortization of prior service cost Defined benefit plan amortization of actuarial loss. Defined benefit plan amortization of actuarial loss Amortization of actuarial loss (gain) Defined Benefit Plan, Net Periodic Benefit Cost Net periodic benefit cost Defined Benefit Plan Actuarial Gain Loss, Not Included In Periodic Benefit Cost Defined Benefit Plan Actuarial Gain Loss, Not Included In Periodic Benefit Cost Net actuarial loss (gain) Net actuarial loss Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax Prior service cost (credit) Prior service cost Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax Total recognized in regulatory assets Liability Class [Axis] Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain] Fair Value by Liability Class [Domain] Obligations [Member] Obligations [Member] Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Discount rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets Expected return on plan assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Rate of compensation increase Defined Benefit Plan, Ultimate Health Care Cost Trend Rate Health care cost trend rate Defined Benefit Plan Ultimate Trend Rate Defined Benefit Plan Ultimate Trend Rate Rate to which the cost trend is assumed to decline (the ultimate trend rate) Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate Year that the rate reaches the ultimate trend rate Return Seeking Assets [Member] Return Seeking Assets [Member] Return Seeking Assets [Member] Hedge Funds [Member] Liability Hedging Assets [Member] Defined Benefit Plan, Target Plan Asset Allocations Target Allocation Defined Benefit Plan, Actual Plan Asset Allocations Percentage of Plan Assets Equity Securities Common Stocks [Member] Equity Securities Common Stocks [Member] Common stocks [Member] International equities [Member] International Equities [Member] International equities [Member] Real Estate Funds [Member] Real estate [Member] Hedge Funds Multistrategy [Member] Hedge / Diversifying Strategies [Member] Credit [Member] Credit [Member] Cash And Cash Equivalents [Member] Cash And Cash Equivalents [Member] Fair Value Measured At Net Asset Value Per Share [Member] Assets Measured At NAV [Member] Water And Wastewater Rates [Table] Water And Wastewater Rates [Table] Scenario [Axis] Scenario Unspecified [Domain] Scenario, Unspecified [Domain] Year 1 [Member] Year1 [Member] Year 1 [Member] Year 2 [Member] Year2 [Member] Year 2 [Member] Year 3 [Member] Year3 [Member] Year 3 [Member] Pennsylvania, Ohio And New Jersey [Member] Pennsylvania Ohio And New Jersey [Member] Pennsylvania, Ohio And New Jersey [Member] N [J] New Jersey [Member] V [A] Virginia [Member] Kentucky And Pennsylvania [Member] Kentucky And Pennsylvania [Member] Kentucky And Pennsylvania [Member] Water And Wastewater Rates [Line Items] Water And Wastewater Rates [Line Items] Change in other operating revenue, annually Change In Other Operating Revenue, Annually Change in other operating revenue, annually Infrastructure rehabilitation surcharge percentage, reset level upon new base rates Infrastructure Rehabilitation Surcharge Percentage, Reset Level Upon New Base Rates Infrastructure rehabilitation surcharge percentage, reset level upon new base rates Customer surcharge period Customer Surcharge Period Customer surcharge period Service line replacement costs. Service Line Replacement Costs Service line replacement costs Allowed Base Rate Increase, Amount Designed To Increase Annual Operating Revenues Allowed Base Rate Increase, Amount Designed To Increase Annual Operating Revenues Allowed base rate increase, amount designed to increase annual operating revenues Distribution System Improvement Charges Distribution System Improvement Charges Distribution system improvement charges Public Utilities, Approved Rate Increase (Decrease), Amount Base rate increase (decrease) Infrastructure Rehabiliation Surcharges Designed To Increase Total Operating Revenue On An Annual Basis Infrastructure Rehabiliation Surcharges Designed To Increase Total Operating Revenue On An Annual Basis Infrastructure rehabilitation surcharges designed to increase total operating revenues on an annual basis Base rate increase designed to increase total operating revenues on an annual basis Base rate increase designed to increase total operating revenues on an annual basis Distribution System Improvement Charges Reset Level Upon New Base Rates Distribution System Improvement Charges Reset Level Upon New Base Rates Distribution system improvement charges reset level upon new base rates Number of rate decisions Number Of Rate Decisions Number of rate decisions Revenues Realized Revenues Realized Revenues realized Infrastructure rehabilitation surcharges Infrastructure Rehabilitation Surcharges Infrastructure rehabilitation surcharges Infrastructure rehabilitation surcharges, capped percentage Infrastructure Rehabilitation Surcharges Capped Percentage Infrastructure rehabilitation surcharges, capped percentage Number Of States Number Of States Number Of States Schedule of Segment Reporting Information, by Segment [Table] Corporate And Other [Member] Other [Member] Segment Reporting Information [Line Items] Number of Operating Segments Operating Segments Number of Reportable Segments Reportable Segments Operating Segments [Member] Operating Segments [Member] Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Interest expense, net of AFUDC which represents capitalized costs used to finance the construction of utility plants. Interest Expense Net Of Afudc Interest expense, net Income (Loss) from Equity Method Investments Equity in earnings of subsidiaries Segment Reporting, Other Segment Item, Amount Other segment items Income Tax Paid, by Individual Jurisdiction [Table] Income Tax Paid, by Individual Jurisdiction [Line Items] Income Taxes Paid, Net Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Parent Company [Member] Parent Company [Member] Cash Dividends Paid to Parent Company by Consolidated Subsidiaries Dividends paid to parent by wholly-owned subsidiaries Accounts Receivable Net Current Affiliates. Accounts Receivable Net Current Affiliates Current accounts receivable – affiliates Accounts receivable - affiliates Notes Receivable Net Affiliates. Notes Receivable Net Affiliates Notes receivable – affiliates Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statements, Captions [Line Items] Accounts Payable Current Affiliates Accounts Payable Current Affiliates Accounts payable - affiliates Condensed Income Statement [Table] Condensed Income Statements, Captions [Line Items] Other Operating Income Other income Other Cost and Expense, Operating Operating expense and other expenses Interest Income, Other Interest income Income from continuing operations before income taxes Loss before equity in earnings of subsidiaries and income taxes Condensed Cash Flow Statement [Table] Condensed Cash Flow Statements, Captions [Line Items] Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan Proceeds from issuance of common stock under dividend reinvestment plan Insider Trading Arrangements [Abstract] Insider Trading Arrangements [Abstract] Trading Arrangements, by Individual [Table] Insider Trading Arrangements [Line Items] Rule 10b5-1 Arrangement Adopted [Flag] Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Terminated [Flag] Non-Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Rule 10b5-1 Arrangement Terminated Insider Trading Policies and Procedures [Line Items] Insider Trading Policies and Procedures Adopted [Flag] Insider Trading Policies and Procedures Adopted Cybersecurity Risk Management, Strategy, and Governance [Abstract] Cybersecurity Risk Management, Strategy, and Governance [Table] Cybersecurity Risk Management, Strategy, and Governance [Line Items] Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] Cybersecurity Risk Management Processes Integrated [Flag] Cybersecurity Risk Management Processes Integrated [Text Block] Cybersecurity Risk Management Third Party Engaged [Flag] Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block] Cybersecurity Risk Board of Directors Oversight [Text Block] Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block] Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block] Cybersecurity Risk Role of Management [Text Block] Cybersecurity Risk Management Positions or Committees Responsible [Flag] Cybersecurity Risk Management Positions or Committees Responsible [Text Block] Cybersecurity Risk Management Expertise of Management Responsible [Text Block] Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block] Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] Long Term Debt Of Subsidiaries Zero Point Zero Zero Percentage To Zero Point Nine Nine Percentage [Member] Long Term Debt Of Subsidiaries Zero Point Zero Zero Percentage To Zero Point Nine Nine Percentage [Member] Notes Ranging From 0.00% To 0.99% [Member] Long Term Debt Of Subsidiaries One Point Zero Zero Percentage To One Point Nine Nine Percentage Member Long Term Debt Of Subsidiaries One Point Zero Zero Percentage To One Point Nine Nine Percentage [Member] Notes Ranging From 1.00% To 1.99% [Member] Long Term Debt Of Subsidiaries Two Point Zero Zero Percentage To Two Point Nine Nine Percentage Member Long Term Debt Of Subsidiaries Two Point Zero Zero Percentage To Two Point Nine Nine Percentage [Member] Notes Ranging From 2.00% To 2.99% [Member] Long Term Debt Of Subsidiaries Three Point Zero Zero Percentage To Three Point Nine Nine Percentage Member Long Term Debt Of Subsidiaries Three Point Zero Zero Percentage To Three Point Nine Nine Percentage [Member] Notes Ranging From 3.00% To 3.99% [Member] Long Term Debt Of Subsidiaries Four Point Zero Zero Percentage To Four Point Nine Nine Percentage Member Long Term Debt Of Subsidiaries Four Point Zero Zero Percentage To Four Point Nine Nine Percentage [Member] Notes Ranging From 4.00% To 4.99% [Member] Long Term Debt Of Subsidiaries Five Point Zero Zero Percentage To Five Point Nine Nine Percentage Member Long Term Debt Of Subsidiaries Five Point Zero Zero Percentage To Five Point Nine Nine Percentage [Member] Notes Ranging From 5.00% To 5.99% [Member] Long Term Debt Of Subsidiaries Six Point Zero Zero Percentage To Six Point Nine Nine Percentage Member Long Term Debt Of Subsidiaries Six Point Zero Zero Percentage To Six Point Nine Nine Percentage [Member] Notes Ranging From 6.00% To 6.99% [Member] Long Term Debt Of Subsidiaries Seven Point Zero Zero Percentage To Seven Point Nine Nine Percentage Member Long Term Debt Of Subsidiaries Seven Point Zero Zero Percentage To Seven Point Nine Nine Percentage [Member] Notes Ranging From 7.00% To 7.99% [Member] Long Term Debt Of Subsidiaries Eight Point Zero Zero Percentage To Eight Point Nine Nine Percentage Member Long Term Debt Of Subsidiaries Eight Point Zero Zero Percentage To Eight Point Nine Nine Percentage [Member] Notes Ranging From 8.00% To 8.99% [Member] Long Term Debt Of Subsidiaries Nine Point Zero Zero Percentage To Nine Point Nine Nine Percentage Member Long Term Debt Of Subsidiaries Nine Point Zero Zero Percentage To Nine Point Nine Nine Percentage [Member] Notes Ranging From 9.00% To 9.99% [Member] Revolving Credit Agreement, Due 2027 [Member] Revolving Credit Agreement Due B [Member] Revolving Credit Agreement, Due 2027 [Member] Commercial Paper Program [Member] Commercial Paper Program [Member] Commercial Paper Program [Member] Notes At 2.40% Due 2031 [Member] Notes Bb [Member] Notes At 2.40% Due 2031 [Member] NotesAaMember Notes Aa [Member] Notes At 2.704% Due 2030 [Member] Unsecured Notes B Member. Unsecured Notes B [Member] Notes Ranging From 3.01% To 3.59% Due 2029 Through 2050 [Member] Notes At 5.375%, Due 2034 [Member] Notes Z [Member] Notes At 4.276%, Due 2049 [Member] Notes At 4.80%, Due 2027 [Member] Notes E [Member] Notes At 4.80%, Due 2027 [Member] Notes At 5.25%, Due 2035 [Member] Notes At5.25 Due2035 [Member] Notes At 5.25%, Due 2035 [Member] Notes At 5.30%, Due 2052 [Member] Notes At Five Point Thirty Percent Due Two Thousand Fifty Two [Member] Notes At 5.30%, Due 2052 [Member] Notes At 5.375%, Due 2034 [Member] Notes At5.375 Due2034 [Member] Notes At 5.375%, Due 2034 [Member] Notes At 5.95%, Due 2024 through 2034 [Member] Notes G [Member] Notes At 5.95%, Due 2033 through 2034 [Member] American Water Works Company, Inc. [Member] American Water Works Company Inc. [Member] American Water Works Company, Inc. [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite Lived Intangible Assets Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Relationships [Member] Customer Relationships [Member] Noncompete Agreements [Member] Noncompete Agreements [Member] Prepaid Pension [Member] Prepaid Pension [Member] Prepaid Pension [Member] Other Post-Retirement Benefit Plan Assets [Member] Other Post Retirement Benefit Plan Assets [Member] Other Post-Retirement Benefit Plan Assets [Member] Peoples Subsidiaries [Member] Peoples Subsidiaries [Member] Peoples Subsidiaries [Member] East Whiteland Township [Member] East Whiteland Township [Member] East Whiteland Township [Member] Glenview, Illinois [Member] Glenview Illinois [Member] Glenview, Illinois [Member] Greenville, Pennsylvania [Member] Greenville Pennsylvania [Member] Greenville, Pennsylvania [Member] Beaver Falls Pennsylvania Member Beaver Falls Pennsylvania [Member] Beaver Falls Pennsylvania [Member] Harris County, Texas [Member] Harris County Texas [Member] Harris County, Texas [Member] I [N] Indiana [Member] W [V] West Virginia [Member] Disposal Group Name [Axis] Disposal Groups Including Discontinued Operations Name [Domain] Disposal Group Name [Domain] Regulated Natural Gas Utility Assets [Member] Regulated Natural Gas Utility Assets [Member] Regulated Natural Gas Utility Assets [Member] Financial Instrument [Axis] Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Financial Instruments [Domain] Convertible Debt Securities [Member] Convertible Note Investment [Member] Foreign Country [Member] Foreign Tax Jurisdiction [Member] Recorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Recorded Unconditional Purchase Obligation Category [Domain] Recorded Unconditional Purchase Obligation, Category [Domain] Public Utilities Inventory Fuel [Member] Public Utilities, Inventory, Fuel [Member] Peoples Natural Gas Companies [Member] Peoples Natural Gas Companies [Member] Peoples Natural Gas Companies [Member] First Mortgage Bonds E [Member] First Mortgage Bonds E [Member] First Mortgage Bonds Due In 2035 [Member] First Mortgage Bonds F [Member] First Mortgage Bonds F [Member] First Mortgage Bonds Due In 2040 [Member] Long-term Debt, Type [Axis] Longterm Debt Type [Domain] Long-term Debt, Type [Domain] Unsecured Debt [Member] Unsecured Debt [Member] Senior Notes [Member] Senior Notes [Member] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Commercial Paper [Member] Commercial Paper [Member] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] New York Federal Reserve Bank rate. New York Federal Reserve Bank Rate [Member] New York Federal Reserve Bank rate [Member] Prime Rate [Member] Prime Rate [Member] Secured Overnight Financing Rate Sofr Overnight Index Swap Rate [Member] Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Restriction Free [Member] Restriction Free [Member] Restriction Free [Member] Dividends [Axis] Dividends [Domain] Dividends [Domain] O2026Q4 Dividends [Member] O2026 Q4 Dividends [Member] O2026Q4 Dividends [Member] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] At Market Sales Agreements Member At Market Sales Agreements [Member] At Market Sales Agreements 2022 [Member] At Market Sales Agreements 2024 [Member] At Market Sales Agreements2024 [Member] At Market Sales Agreements 2024 [Member] K [Y] Kentucky [Member] Regulated Water And Wastewater [Member] Regulated Water And Wastewater [Member] Regulated Water And Wastewater [Member] Intersegment Elimination [Member] Intersegment Eliminations [Member] Reportable Segment Aggregation Before Other Operating Segment [Member] Total Reportable Segments [Member] Other And Eliminations [Member] Other And Eliminations [Member] Other And Eliminations [Member] Other States [Member] Other States [Member] Other States [Member] Awards Close in Time to MNPI Disclosures [Line Items] Awards Close in Time to MNPI Disclosures [Table]