ACES Renewable Energy Contracting Capacity Requirement

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Total renewable energy capacity (in megawatts) required meet the Rhode Island Long-Term Contracting Standard.

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No definition available.

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Claim By Former Affiliate [Abstract]

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Amount of power (in megawatts) contracted to purchase as part of the Deepwater Agreement.

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No definition available.

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Amount of power (in megawatts) contracted to purchase as part of the first solicitation required by the Rhode Island Long-Term Contracting Standard.

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No definition available.

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Amount of power (in megawatts) contracted to purchase as part of the fourth solicitation required by the Rhode Island Long-Term Contracting Standard

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No definition available.

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- Definition

LTCS Renewable Energy Contract, Offshore Wind Energy Procurement, Power

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No definition available.

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Amount of power (in megawatts) contracted to purchase as part of the second solicitation required by the Rhode Island Long-Term Contracting Standard

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No definition available.

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Amount of power (in megawatts) contracted to purchase as part of the third solicitation required by the Rhode Island Long-Term Contracting Standard

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No definition available.

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LTCS Renewable Energy Contract, Three-State Procurement, Power

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No definition available.

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Total renewable energy capacity (in megawatts) required to be contracted under the Rhode Island Long-Term Contracting Standard.

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No definition available.

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Proposed portion of performance incentive awarded to be disallowed by the RIPUC, including interest.

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No definition available.

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- Definition

Initial ownership percentage in new company, Talen Energy, by Riverstone Holdings, LLC upon completion of spinoff transaction.

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No definition available.

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Unrecorded Unconditional Purchase Obligation, to be Paid, Years Four and Five

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Unrecorded Unconditional Purchase Obligation, to be Paid, Years Two and Three

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No definition available.

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- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 410
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org//1943274/2147481931/410-30-50-10

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 410
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Amount awarded to other party in judgment or settlement of litigation.

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No definition available.

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- Definition

The cash inflow associated with the amount received from the sale of a business segment or subsidiary or sale of an entity that is related to it but not strictly controlled during the period (for example, an unconsolidated subsidiary, affiliate, joint venture or equity method investment).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 440
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-Section 50
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-Publisher FASB
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Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

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Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 440
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482648/440-10-50-4

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- Definition

The amount purchased during the period under an unrecorded unconditional purchase obligation (for example, under the take-or-pay or throughput contract).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 440
-SubTopic 10
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482648/440-10-50-4

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Commitments and Contingencies (Energy Purchases, Energy Sales, Other Commitments and Legal Matters) (Details) $ in Millions		12 Months Ended
	Nov. 18, 2014 USD ($)	Dec. 31, 2023 USD ($) MW	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Nov. 27, 2023 USD ($)	Jul. 01, 2022 MW	Dec. 06, 2018 MW	Apr. 09, 2018 MW	Oct. 01, 2015 MW	Jun. 01, 2015	Dec. 31, 2014 MW	May 01, 2012 MW	Jul. 01, 2011 MW	Jul. 01, 2010 MW	Jun. 30, 2010 MW
Claim By Former Affiliate [Abstract]
Restructuring And Related Activities Ownership Percentage By Riverstone										35.00%
Proceeds from Divestiture of Businesses and Interests in Affiliates	$ 900
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
LTCS Renewable Energy Contract, Deepwater Agreement, Power \| MW															30
LTCS Renewable Energy Contract, Three-State Procurement, Power \| MW								36.427
LTCS Renewable Energy Contract, Offshore Wind Energy Procurement, Power \| MW							408
LTCS Renewable Energy Contracting Capacity Requirement \| MW											90
LTCS Renewable Energy Contract, First Solicitation, Power \| MW													3.2
LTCS Renewable Energy Contract, Second Solicitation, Power \| MW												3.9
LTCS Renewable Energy Contract, Third Solicitation, Power \| MW									80
Amount of MW Required to Meet LTCS Renewable Energy Contracting Capacity Requirement \| MW		17.2
Litigation Settlement, Amount Awarded to Other Party		$ 115
LTCS Renewable Energy Contract, Fourth Solicitation, Power \| MW														32.1
Proposed portion of performance incentive awarded to be disallowed					$ 13
Minimum [Member]
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
ACES Renewable Energy Contracting Capacity Requirement \| MW						300
Maximum [Member]
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
ACES Renewable Energy Contracting Capacity Requirement \| MW						1,200
Power Purchase [Member]
Energy Purchase Commitments (Numeric) [Abstract]
2023		38
2024		35
2025		35
2026		36
2027		32
Thereafter		252
Total		428
Purchases		29	$ 30	$ 19
Rhode Island Energy \| Power Purchase [Member]
Energy Purchase Commitments (Numeric) [Abstract]
2023		425
Thereafter		369
Total		1,087
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
2025-2026		196
2027-2028		97
Louisville Gas And Electric Co [Member] \| Power Purchase [Member]
Energy Purchase Commitments (Numeric) [Abstract]
2023		26
2024		24
2025		24
2026		25
2027		22
Thereafter		175
Total		296
Purchases		20	21	13
Kentucky Utilities Co [Member] \| Power Purchase [Member]
Energy Purchase Commitments (Numeric) [Abstract]
2023		12
2024		11
2025		11
2026		11
2027		10
Thereafter		77
Total		132
Purchases		9	9	$ 6
PPL Electric Additional Sites [Member] \| PPL Electric [Member]
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
Accrual for Environmental Loss Contingencies		8	11
PPL Electric Additional Sites [Member] \| PPL Electric Utilities Corp [Member]
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
Accrual for Environmental Loss Contingencies		$ 8	$ 11