Amount of public utility's approved rate increase (decrease) by regulatory agency.

No definition available.

Name:	us-gaap_PublicUtilitiesApprovedRateIncreaseDecreaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Allowed Base Rate Increase, Amount Designed To Increase Annual Operating Revenues

+ References

No definition available.

+ Details

Name:	wtrg_AllowedBaseRateIncreaseAmountDesignedToIncreaseAnnualOperatingRevenues
Namespace Prefix:	wtrg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Base rate increase designed to increase total operating revenues on an annual basis

+ References

No definition available.

+ Details

Name:	wtrg_BaseRateIncreaseDesignedToIncreaseTotalOperatingRevenuesOnAnnualBasis
Namespace Prefix:	wtrg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Distribution System Improvement Charges Reset Level Upon New Base Rates

+ References

No definition available.

+ Details

Name:	wtrg_DistributionSystemImprovementChargesResetLevelUponNewBaseRates
Namespace Prefix:	wtrg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Infrastructure Rehabiliation Surcharges Designed To Increase Total Operating Revenue On An Annual Basis

+ References

No definition available.

+ Details

Name:	wtrg_InfrastructureRehabiliationSurchargesDesignedToIncreaseTotalOperatingRevenueOnAnnualBasis
Namespace Prefix:	wtrg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of operating divisions

+ References

No definition available.

+ Details

Name:	wtrg_NumberOfOperatingDivision
Namespace Prefix:	wtrg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Water And Wastewater Rates [Line Items]

+ References

No definition available.

+ Details

Name:	wtrg_WaterAndWastewaterRatesLineItems
Namespace Prefix:	wtrg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_StatementGeographicalAxis=wtrg_PennsylvaniaAndOhioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=wtrg_RegulatedWaterAndWastewaterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_IL
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_NJ
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_TX
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_VA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_IN
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=wtrg_WastewaterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_PA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=wtrg_NaturalGasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_OH
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=wtrg_WaterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_KY
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_NC
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Rate Activity (Narrative) (Details) $ in Thousands											6 Months Ended	12 Months Ended
Rate Activity (Narrative) (Details) $ in Thousands	Jul. 06, 2026 USD ($)	Jun. 12, 2026 USD ($)	Jun. 10, 2026 USD ($)	May 26, 2026 USD ($)	Mar. 27, 2026 USD ($)	Jan. 30, 2026 USD ($)	Jul. 30, 2025 USD ($)	Jul. 01, 2025 USD ($)	Jun. 20, 2025 USD ($)	Feb. 07, 2025 USD ($)	Jun. 30, 2026 USD ($) item	Dec. 31, 2028 USD ($)	Dec. 31, 2027 USD ($)
Pennsylvania and Ohio [Member] \| Regulated Water And Wastewater [Member]
Water And Wastewater Rates [Line Items]
Infrastructure rehabilitation surcharges designed to increase total operating revenues on an annual basis											$ 3,653
Illinois [Member] \| Regulated Water And Wastewater [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)				$ 26,501
New Jersey [Member] \| Regulated Water And Wastewater [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)						$ 7,886
Infrastructure rehabilitation surcharges designed to increase total operating revenues on an annual basis											2,610
Texas [Member] \| Regulated Water And Wastewater [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)									$ 29,149
Virginia [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)							$ 7,927
Indiana [Member] \| Regulated Water And Wastewater [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)		$ 4,813
Distribution system improvement charges reset level upon new base rates											$ 1,003
Indiana [Member] \| Wastewater [Member]
Water And Wastewater Rates [Line Items]
Number of operating divisions \| item											2
Pennsylvania [Member] \| Regulated Water And Wastewater [Member]
Water And Wastewater Rates [Line Items]
Allowed base rate increase, amount designed to increase annual operating revenues										$ 73,000
Base rate increase (decrease)										$ 110,940
Base rate increase designed to increase total operating revenues on an annual basis										6.73%
Distribution system improvement charges reset level upon new base rates										$ 37,940
Pennsylvania [Member] \| Regulated Natural Gas [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)					$ 163,000
Infrastructure rehabilitation surcharges designed to increase total operating revenues on an annual basis											$ 9,804
Ohio [Member] \| Regulated Water And Wastewater [Member]
Water And Wastewater Rates [Line Items]
Allowed base rate increase, amount designed to increase annual operating revenues			$ 10,536
Distribution system improvement charges reset level upon new base rates											$ 1,834
Ohio [Member] \| Regulated Water [Member]
Water And Wastewater Rates [Line Items]
Number of operating divisions \| item											2
Kentucky [Member] \| Regulated Natural Gas [Member]
Water And Wastewater Rates [Line Items]
Allowed base rate increase, amount designed to increase annual operating revenues								$ 7,700
Infrastructure rehabilitation surcharges designed to increase total operating revenues on an annual basis											$ 2,892
Base rate increase designed to increase total operating revenues on an annual basis								11.20%
Subsequent Event [Member] \| North Carolina [Member] \| Regulated Water And Wastewater [Member]
Water And Wastewater Rates [Line Items]
Allowed base rate increase, amount designed to increase annual operating revenues	$ 24,240
Scenario, Forecast [Member] \| North Carolina [Member] \| Regulated Water And Wastewater [Member]
Water And Wastewater Rates [Line Items]
Allowed base rate increase, amount designed to increase annual operating revenues												$ 5,306	$ 5,455
Scenario, Forecast [Member] \| Indiana [Member] \| Regulated Water And Wastewater [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)												$ 308	$ 1,960