3.26.1 html 356 360 1 true 93 0 false 16 false false R1.htm 1001 - Document - Cover Page Sheet http://www.essential.com/role/CoverPage Cover Page Cover 1 false false R2.htm 1002 - Statement - Consolidated Balance Sheets Sheet http://www.essential.com/role/ConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 1003 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://www.essential.com/role/ConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 1004 - Statement - Consolidated Statements of Operations Sheet http://www.essential.com/role/ConsolidatedStatementsOfOperations Consolidated Statements of Operations Statements 4 false false R5.htm 1005 - Statement - Consolidated Statements of Comprehensive Income Sheet http://www.essential.com/role/ConsolidatedStatementsOfComprehensiveIncome Consolidated Statements of Comprehensive Income Statements 5 false false R6.htm 1006 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical) Sheet http://www.essential.com/role/ConsolidatedStatementsOfComprehensiveIncomeParenthetical Consolidated Statements of Comprehensive Income (Parenthetical) Statements 6 false false R7.htm 1007 - Statement - Consolidated Statements of Cash Flows Sheet http://www.essential.com/role/ConsolidatedStatementsOfCashFlows Consolidated Statements of Cash Flows Statements 7 false false R8.htm 1008 - Statement - Consolidated Statements of Cash Flows (Parenthetical) Sheet http://www.essential.com/role/ConsolidatedStatementsOfCashFlowsParenthetical Consolidated Statements of Cash Flows (Parenthetical) Statements 8 false false R9.htm 1009 - Statement - Consolidated Statements of Changes in Shareholders' Equity Sheet http://www.essential.com/role/ConsolidatedStatementsOfChangesInShareholdersEquity Consolidated Statements of Changes in Shareholders' Equity Statements 9 false false R10.htm 1010 - Statement - Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) Sheet http://www.essential.com/role/ConsolidatedStatementsOfChangesInShareholdersEquityParenthetical Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) Statements 10 false false R11.htm 1011 - Disclosure - Basis of Presentation Sheet http://www.essential.com/role/BasisOfPresentation Basis of Presentation Notes 11 false false R12.htm 1012 - Disclosure - Significant Accounting Policies Sheet http://www.essential.com/role/SignificantAccountingPolicies Significant Accounting Policies Notes 12 false false R13.htm 1013 - Disclosure - Regulatory Matters Sheet http://www.essential.com/role/RegulatoryMatters Regulatory Matters Notes 13 false false R14.htm 1014 - Disclosure - Revenue Recognition Sheet http://www.essential.com/role/RevenueRecognition Revenue Recognition Notes 14 false false R15.htm 1015 - Disclosure - Mergers, Acquisitions and Divestitures Sheet http://www.essential.com/role/MergersAcquisitionsAndDivestitures Mergers, Acquisitions and Divestitures Notes 15 false false R16.htm 1016 - Disclosure - Shareholders' Equity Sheet http://www.essential.com/role/ShareholdersEquity Shareholders' Equity Notes 16 false false R17.htm 1017 - Disclosure - Long-Term Debt Sheet http://www.essential.com/role/LongTermDebt Long-Term Debt Notes 17 false false R18.htm 1018 - Disclosure - Short-Term Debt Sheet http://www.essential.com/role/ShortTermDebt Short-Term Debt Notes 18 false false R19.htm 1019 - Disclosure - Income Taxes Sheet http://www.essential.com/role/IncomeTaxes Income Taxes Notes 19 false false R20.htm 1020 - Disclosure - Pension and Other Postretirement Benefits Sheet http://www.essential.com/role/PensionAndOtherPostretirementBenefits Pension and Other Postretirement Benefits Notes 20 false false R21.htm 1021 - Disclosure - Commitments and Contingencies Sheet http://www.essential.com/role/CommitmentsAndContingencies Commitments and Contingencies Notes 21 false false R22.htm 1022 - Disclosure - Earnings Per Common Share Sheet http://www.essential.com/role/EarningsPerCommonShare Earnings Per Common Share Notes 22 false false R23.htm 1023 - Disclosure - Fair Value of Financial Information Sheet http://www.essential.com/role/FairValueOfFinancialInformation Fair Value of Financial Information Notes 23 false false R24.htm 1024 - Disclosure - Leases Sheet http://www.essential.com/role/Leases Leases Notes 24 false false R25.htm 1025 - Disclosure - Segment Information Sheet http://www.essential.com/role/SegmentInformation Segment Information Notes 25 false false R26.htm 1026 - Disclosure - Significant Accounting Policies (Policies) Sheet http://www.essential.com/role/SignificantAccountingPoliciesPolicies Significant Accounting Policies (Policies) Policies http://www.essential.com/role/SignificantAccountingPolicies 26 false false R27.htm 1027 - Disclosure - Significant Accounting Policies (Tables) Sheet http://www.essential.com/role/SignificantAccountingPoliciesTables Significant Accounting Policies (Tables) Tables http://www.essential.com/role/SignificantAccountingPolicies 27 false false R28.htm 1028 - Disclosure - Regulatory Matters (Tables) Sheet http://www.essential.com/role/RegulatoryMattersTables Regulatory Matters (Tables) Tables http://www.essential.com/role/RegulatoryMatters 28 false false R29.htm 1029 - Disclosure - Revenue Recognition (Tables) Sheet http://www.essential.com/role/RevenueRecognitionTables Revenue Recognition (Tables) Tables http://www.essential.com/role/RevenueRecognition 29 false false R30.htm 1030 - Disclosure - Mergers, Acquisitions and Divestitures (Tables) Sheet http://www.essential.com/role/MergersAcquisitionsAndDivestituresTables Mergers, Acquisitions and Divestitures (Tables) Tables http://www.essential.com/role/MergersAcquisitionsAndDivestitures 30 false false R31.htm 1031 - Disclosure - Shareholders' Equity (Tables) Sheet http://www.essential.com/role/ShareholdersEquityTables Shareholders' Equity (Tables) Tables http://www.essential.com/role/ShareholdersEquity 31 false false R32.htm 1032 - Disclosure - Short-Term Debt (Tables) Sheet http://www.essential.com/role/ShortTermDebtTables Short-Term Debt (Tables) Tables http://www.essential.com/role/ShortTermDebt 32 false false R33.htm 1033 - Disclosure - Pension and Other Postretirement Benefits (Tables) Sheet http://www.essential.com/role/PensionAndOtherPostretirementBenefitsTables Pension and Other Postretirement Benefits (Tables) Tables http://www.essential.com/role/PensionAndOtherPostretirementBenefits 33 false false R34.htm 1034 - Disclosure - Earnings Per Common Share (Tables) Sheet http://www.essential.com/role/EarningsPerCommonShareTables Earnings Per Common Share (Tables) Tables http://www.essential.com/role/EarningsPerCommonShare 34 false false R35.htm 1035 - Disclosure - Fair Value of Financial Information (Tables) Sheet http://www.essential.com/role/FairValueOfFinancialInformationTables Fair Value of Financial Information (Tables) Tables http://www.essential.com/role/FairValueOfFinancialInformation 35 false false R36.htm 1036 - Disclosure - Segment Information (Tables) Sheet http://www.essential.com/role/SegmentInformationTables Segment Information (Tables) Tables http://www.essential.com/role/SegmentInformation 36 false false R37.htm 1037 - Disclosure - Significant Accounting Policies - Additional Information (Details) Sheet http://www.essential.com/role/SignificantAccountingPoliciesAdditionalInformationDetails Significant Accounting Policies - Additional Information (Details) Details 37 false false R38.htm 1038 - Disclosure - Significant Accounting Policies - Schedule of Cash, Cash Equivalents and Restricted Funds (Details) Sheet http://www.essential.com/role/SignificantAccountingPoliciesScheduleOfCashCashEquivalentsAndRestrictedFundsDetails Significant Accounting Policies - Schedule of Cash, Cash Equivalents and Restricted Funds (Details) Details 38 false false R39.htm 1039 - Disclosure - Significant Accounting Policies - Schedule of Allowance for Uncollectible Accounts (Details) Sheet http://www.essential.com/role/SignificantAccountingPoliciesScheduleOfAllowanceForUncollectibleAccountsDetails Significant Accounting Policies - Schedule of Allowance for Uncollectible Accounts (Details) Details 39 false false R40.htm 1040 - Disclosure - Regulatory Matters - Schedule of General Rate Cases (Details) Sheet http://www.essential.com/role/RegulatoryMattersScheduleOfGeneralRateCasesDetails Regulatory Matters - Schedule of General Rate Cases (Details) Details 40 false false R41.htm 1041 - Disclosure - Regulatory Matters - General Rate Cases Additional Information (Details) Sheet http://www.essential.com/role/RegulatoryMattersGeneralRateCasesAdditionalInformationDetails Regulatory Matters - General Rate Cases Additional Information (Details) Details 41 false false R42.htm 1042 - Disclosure - Regulatory Matters - Pending General Rate Case Filings Additional Information (Details) Sheet http://www.essential.com/role/RegulatoryMattersPendingGeneralRateCaseFilingsAdditionalInformationDetails Regulatory Matters - Pending General Rate Case Filings Additional Information (Details) Details 42 false false R43.htm 1043 - Disclosure - Regulatory Matters - Schedule of Infrastructure Surcharge (Details) Sheet http://www.essential.com/role/RegulatoryMattersScheduleOfInfrastructureSurchargeDetails Regulatory Matters - Schedule of Infrastructure Surcharge (Details) Details 43 false false R44.htm 1044 - Disclosure - Regulatory Matters - Pending Infrastructure Surcharge Filings Additional Information (Details) Sheet http://www.essential.com/role/RegulatoryMattersPendingInfrastructureSurchargeFilingsAdditionalInformationDetails Regulatory Matters - Pending Infrastructure Surcharge Filings Additional Information (Details) Details 44 false false R45.htm 1045 - Disclosure - Revenue Recognition - Disaggregated Revenues (Details) Sheet http://www.essential.com/role/RevenueRecognitionDisaggregatedRevenuesDetails Revenue Recognition - Disaggregated Revenues (Details) Details 45 false false R46.htm 1046 - Disclosure - Revenue Recognition - Contract Assets and Liabilities (Details) Sheet http://www.essential.com/role/RevenueRecognitionContractAssetsAndLiabilitiesDetails Revenue Recognition - Contract Assets and Liabilities (Details) Details 46 false false R47.htm 1047 - Disclosure - Revenue Recognition - Remaining Performance Obligations (Details) Sheet http://www.essential.com/role/RevenueRecognitionRemainingPerformanceObligationsDetails Revenue Recognition - Remaining Performance Obligations (Details) Details 47 false false R48.htm 1048 - Disclosure - Mergers, Acquisitions and Divestitures - Schedule of Preliminary Purchase Price Allocation for the Acquisition (Details) Sheet http://www.essential.com/role/MergersAcquisitionsAndDivestituresScheduleOfPreliminaryPurchasePriceAllocationForTheAcquisitionDetails Mergers, Acquisitions and Divestitures - Schedule of Preliminary Purchase Price Allocation for the Acquisition (Details) Details 48 false false R49.htm 1049 - Disclosure - Mergers, Acquisitions and Divestitures (Details) Sheet http://www.essential.com/role/MergersAcquisitionsAndDivestituresDetails Mergers, Acquisitions and Divestitures (Details) Details http://www.essential.com/role/MergersAcquisitionsAndDivestituresTables 49 false false R50.htm 1050 - Disclosure - Shareholders' Equity - Additional Information (Details) Sheet http://www.essential.com/role/ShareholdersEquityAdditionalInformationDetails Shareholders' Equity - Additional Information (Details) Details 50 false false R51.htm 1051 - Disclosure - Shareholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax (Details) Sheet http://www.essential.com/role/ShareholdersEquityScheduleOfChangesInAccumulatedOtherComprehensiveLossByComponentNetOfTaxDetails Shareholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax (Details) Details 51 false false R52.htm 1052 - Disclosure - Long-Term Debt - Additional Information (Details) Sheet http://www.essential.com/role/LongTermDebtAdditionalInformationDetails Long-Term Debt - Additional Information (Details) Details 52 false false R53.htm 1053 - Disclosure - Short-Term Debt - Additional Information (Details) Sheet http://www.essential.com/role/ShortTermDebtAdditionalInformationDetails Short-Term Debt - Additional Information (Details) Details 53 false false R54.htm 1054 - Disclosure - Short-Term Debt - Schedule of Company's Aggregate Credit Facility Commitments, Commercial Paper Limit, Letter of Credit Availability and Availability Capacity (Details) Sheet http://www.essential.com/role/ShortTermDebtScheduleOfCompanysAggregateCreditFacilityCommitmentsCommercialPaperLimitLetterOfCreditAvailabilityAndAvailabilityCapacityDetails Short-Term Debt - Schedule of Company's Aggregate Credit Facility Commitments, Commercial Paper Limit, Letter of Credit Availability and Availability Capacity (Details) Details 54 false false R55.htm 1055 - Disclosure - Short-Term Debt - Schedule of Availability Liquidity (Details) Sheet http://www.essential.com/role/ShortTermDebtScheduleOfAvailabilityLiquidityDetails Short-Term Debt - Schedule of Availability Liquidity (Details) Details 55 false false R56.htm 1056 - Disclosure - Income Taxes - Additional Information (Details) Sheet http://www.essential.com/role/IncomeTaxesAdditionalInformationDetails Income Taxes - Additional Information (Details) Details 56 false false R57.htm 1057 - Disclosure - Pension and Other Postretirement Benefits - Additional Information (Details) Sheet http://www.essential.com/role/PensionAndOtherPostretirementBenefitsAdditionalInformationDetails Pension and Other Postretirement Benefits - Additional Information (Details) Details 57 false false R58.htm 1058 - Disclosure - Pension and Other Postretirement Benefits - Schedule of Net Periodic Benefit Cost Components (Details) Sheet http://www.essential.com/role/PensionAndOtherPostretirementBenefitsScheduleOfNetPeriodicBenefitCostComponentsDetails Pension and Other Postretirement Benefits - Schedule of Net Periodic Benefit Cost Components (Details) Details 58 false false R59.htm 1059 - Disclosure - Commitments and Contingencies - Additional Information (Details) Sheet http://www.essential.com/role/CommitmentsAndContingenciesAdditionalInformationDetails Commitments and Contingencies - Additional Information (Details) Details 59 false false R60.htm 1060 - Disclosure - Earnings Per Common Share - Schedule of Reconciliation of Numerator and Denominator for Basic and Diluted Earnings Per Share (Details) Sheet http://www.essential.com/role/EarningsPerCommonShareScheduleOfReconciliationOfNumeratorAndDenominatorForBasicAndDilutedEarningsPerShareDetails Earnings Per Common Share - Schedule of Reconciliation of Numerator and Denominator for Basic and Diluted Earnings Per Share (Details) Details 60 false false R61.htm 1061 - Disclosure - Earnings Per Common Share - Additional Information (Details) Sheet http://www.essential.com/role/EarningsPerCommonShareAdditionalInformationDetails Earnings Per Common Share - Additional Information (Details) Details 61 false false R62.htm 1062 - Disclosure - Fair Value of Financial Information - Additional Information (Details) Sheet http://www.essential.com/role/FairValueOfFinancialInformationAdditionalInformationDetails Fair Value of Financial Information - Additional Information (Details) Details 62 false false R63.htm 1063 - Disclosure - Fair Value of Financial Information - Schedule of Carrying Amounts and Fair Values of Financial Instruments (Details) Sheet http://www.essential.com/role/FairValueOfFinancialInformationScheduleOfCarryingAmountsAndFairValuesOfFinancialInstrumentsDetails Fair Value of Financial Information - Schedule of Carrying Amounts and Fair Values of Financial Instruments (Details) Details 63 false false R64.htm 1064 - Disclosure - Fair Value of Financial Information - Schedule of Measurements of Assets and Liabilities on Recurring Basis (Details) Sheet http://www.essential.com/role/FairValueOfFinancialInformationScheduleOfMeasurementsOfAssetsAndLiabilitiesOnRecurringBasisDetails Fair Value of Financial Information - Schedule of Measurements of Assets and Liabilities on Recurring Basis (Details) Details 64 false false R65.htm 1065 - Disclosure - Fair Value of Financial Information - Schedule of Unrealized Positions for Available-for-sale Fixed-Income Securities (Details) Sheet http://www.essential.com/role/FairValueOfFinancialInformationScheduleOfUnrealizedPositionsForAvailableForSaleFixedIncomeSecuritiesDetails Fair Value of Financial Information - Schedule of Unrealized Positions for Available-for-sale Fixed-Income Securities (Details) Details 65 false false R66.htm 1066 - Disclosure - Fair Value of Financial Information - Schedule of Available-for-sale Fixed-Income Securities (Details) Sheet http://www.essential.com/role/FairValueOfFinancialInformationScheduleOfAvailableForSaleFixedIncomeSecuritiesDetails Fair Value of Financial Information - Schedule of Available-for-sale Fixed-Income Securities (Details) Details 66 false false R67.htm 1067 - Disclosure - Leases - Additional Information (Details) Sheet http://www.essential.com/role/LeasesAdditionalInformationDetails Leases - Additional Information (Details) Details 67 false false R68.htm 1068 - Disclosure - Segment Information - Additional Information (Details) Sheet http://www.essential.com/role/SegmentInformationAdditionalInformationDetails Segment Information - Additional Information (Details) Details 68 false false R69.htm 1069 - Disclosure - Segment Information - Schedule of Summarized Segment Information (Details) Sheet http://www.essential.com/role/SegmentInformationScheduleOfSummarizedSegmentInformationDetails Segment Information - Schedule of Summarized Segment Information (Details) Details 69 false false All Reports Book All Reports d156812d8k.htm d156812dex991.htm wtrg-20260817.xsd http://fasb.org/us-gaap/2026 http://xbrl.sec.gov/dei/2026 false false