Claim By Former Affiliate [Abstract]

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- Definition

Period over which Distribution Adjustment Charge-related qualified remediation costs are amortized.

+ References

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- Definition

Rhode Island Division Of Public Utilities And Carriers Amount Already Refunded Through The RIE Energy Efficiency Mechanism

+ References

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- Definition

Rhode Island Division Of Public Utilities And Carriers Amount To Be Recorded As A Reduction To The Storm Cost Regulatory Asset

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Rhode Island Division Of Public Utilities And Carriers Amount To Be Refunded To The RIE Energy Efficiency Program

+ References

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- Definition

Undiscounted amount of the accrual for environmental loss contingencies.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.Y.Q1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480102/450-20-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481931/410-30-50-7

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- Definition

Amount of expense recovery for known and estimated future costs arising from requirement to perform environmental remediation.

+ References

Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 410
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481960/410-30-45-4

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 410
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481931/410-30-50-12

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Commitments and Contingencies - Legal Matters and Regulatory Issues (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Mar. 04, 2025	Feb. 21, 2025	Dec. 31, 2024
Claim By Former Affiliate [Abstract]
Period Over Which Distribution Adjustment Charge-related Costs Are amortized	10 years
Rhode Island Division Of Public Utilities And Carriers Amount To Be Refunded To The RIE Energy Efficiency Program		$ 10	$ 12
Rhode Island Division Of Public Utilities And Carriers Amount Already Credited To The RIE Energy Efficiency Program		2
Rhode Island Division Of Public Utilities And Carriers Amount To Be Recorded As A Reduction To The Storm Contingency Fund Balance		$ 8
Electric Rates
Claim By Former Affiliate [Abstract]
Environmental Costs Recognized, Recovery Credited to Expense	$ 3
Gas Rates
Claim By Former Affiliate [Abstract]
Environmental Costs Recognized, Recovery Credited to Expense	1
RIE Environmental Remediation
Claim By Former Affiliate [Abstract]
Accrual for Environmental Loss Contingencies, Gross	98			$ 98
PPL Electric [Member] \| PPL Electric Additional Sites [Member]
Claim By Former Affiliate [Abstract]
Accrual for Environmental Loss Contingencies, Gross	8			8
PPL Electric Utilities Corp [Member] \| PPL Electric Additional Sites [Member]
Claim By Former Affiliate [Abstract]
Accrual for Environmental Loss Contingencies, Gross	$ 8			$ 8