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

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

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

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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

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

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Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef
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Reference 4: http://www.xbrl.org/2003/role/exampleRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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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). Includes, but is not limited to, lease not yet commenced.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 440
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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
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Commitments and Contingencies (Energy Purchases, Energy Sales, Other Commitments and Legal Matters) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 04, 2025 USD ($)	Feb. 21, 2025 USD ($)	Dec. 06, 2018 MW	Apr. 09, 2018 MW	Oct. 01, 2015 MW	Dec. 31, 2014 MW	May 01, 2012 MW	Jul. 01, 2011 MW	Jul. 01, 2010 MW	Jun. 30, 2010 MW
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
LTCS Renewable Energy Contract, Offshore Wind Energy Procurement, Power \| MW						407
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
Rhode Island Division Of Public Utilities And Carriers Amount Already Credited To The RIE Energy Efficiency Program				$ 2
LTCS Renewable Energy Contract, Fourth Solicitation, Power \| MW												32.1
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 To Be Recorded As A Reduction To The Storm Contingency Fund Balance				$ 8
Power Purchase [Member]
Energy Purchase Commitments (Numeric) [Abstract]
2023	$ 27
2024	34
2025	35
2026	36
2027	33
Thereafter	267
Total	432
Purchases	37	$ 30	$ 29
Rhode Island Energy \| Power Purchase [Member]
Energy Purchase Commitments (Numeric) [Abstract]
2023	268
Thereafter	346
Total	939
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
2027-2028	199
2029-2030	126
Louisville Gas And Electric Co [Member] \| Power Purchase [Member]
Energy Purchase Commitments (Numeric) [Abstract]
2023	19
2024	24
2025	24
2026	25
2027	23
Thereafter	184
Total	299
Purchases	26	21	20
Kentucky Utilities Co [Member] \| Power Purchase [Member]
Energy Purchase Commitments (Numeric) [Abstract]
2023	8
2024	10
2025	11
2026	11
2027	10
Thereafter	83
Total	133
Purchases	11	9	$ 9
PPL Electric Additional Sites [Member] \| PPL Electric [Member]
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
Accrual for Environmental Loss Contingencies	8	8
PPL Electric Additional Sites [Member] \| PPL Electric Utilities Corp [Member]
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
Accrual for Environmental Loss Contingencies	$ 8	$ 8