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v3.25.4

Acquisitions, Development and Divestitures - Acquisitions (Details) $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 06, 2023 | Dec. 31, 2022 MW | Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Disclosure [Line Items] |  |  |  |  |  |  |  |
Operating Revenues |  |  |  | $ 9,042 | $ 8,462 |  | $ 8,312 |
Net income (loss) |  |  |  | 1,181 | 888 |  | 740 |
Transition Service Agreement Expense |  |  |  |  | 137 |  | 228 |
Goodwill |  |  |  | 2,247 | 2,247 |  |  |
Disposal Group [Line Items] |  |  |  |  |  |  |  |
Transition Service Agreement Expense |  |  |  |  | 137 |  | 228 |
Corporate And Other [Member] |  |  |  |  |  |  |  |
Disclosure [Line Items] |  |  |  |  |  |  |  |
Operating Revenues |  |  |  | 1 | 0 |  | 1 |
Net income (loss) |  |  |  | 217 | 415 |  | 427 |
Goodwill |  |  |  | 860 |  |  |  |
Rhode Island Regulated |  |  |  |  |  |  |  |
Disclosure [Line Items] |  |  |  |  |  |  |  |
Operating Revenues |  |  |  | 2,168 | 2,024 |  | 1,851 |
Net income (loss) |  |  |  | (85) | (109) |  | (96) |
Goodwill |  |  |  | 725 |  |  |  |
Kentucky Utilities Co [Member] |  |  |  |  |  |  |  |
Disclosure [Line Items] |  |  |  |  |  |  |  |
Operating Revenues |  |  |  | 2,064 | 1,964 |  | 1,884 |
Net income (loss) | [1] |  |  | 398 | 356 |  | 312 |
Goodwill |  |  |  | 607 | 607 |  |  |
Disposal Group [Line Items] |  |  |  |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities, Power | MW |  |  | 645 |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities, Power | MW |  |  | 645 |  |  |  |  |
LOUISVILLE GAS And ELECTRIC CO [Member] |  |  |  |  |  |  |  |
Disclosure [Line Items] |  |  |  |  |  |  |  |
Operating Revenues |  |  |  | 1,748 | 1,648 |  | 1,613 |
Net income (loss) |  |  |  | 309 | 297 | [2] | 266 | [2]
Goodwill |  |  |  | 389 | 389 |  |  |
Disposal Group [Line Items] |  |  |  |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities, Power | MW |  |  | 645 |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities, Power | MW |  |  | 645 |  |  |  |  |
New NGCC LG&E Planned Ownership Percentage |  | 0.31 |  |  |  |  |  |
LGE [Member] |  |  |  |  |  |  |  |
Disposal Group [Line Items] |  |  |  |  |  |  |  |
Expected Capital Cost Of Expansion Project |  |  |  | 1,000 |  |  |  |
CPCN NGCC Combustion Turbine Facilities, Power | MW |  |  | 645 |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities, Power | MW |  |  | 645 |  |  |  |  |
KU [Member] |  |  |  |  |  |  |  |
Disposal Group [Line Items] |  |  |  |  |  |  |  |
Expected Capital Cost Of Expansion Project |  |  |  | 1,000 |  |  |  |
CPCN NGCC Combustion Turbine Facilities, Power | MW |  |  | 645 |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities, Power | MW |  |  | 645 |  |  |  |  |
Rhode Island Energy | Rhode Island Energy TSA |  |  |  |  |  |  |  |
Disclosure [Line Items] |  |  |  |  |  |  |  |
Other Nonrecurring (Income) Expense |  |  |  | $ 71 | 307 |  | 262 |
Rhode Island Energy | Accrual for TSA Markup |  |  |  |  |  |  |  |
Disclosure [Line Items] |  |  |  |  |  |  |  |
Other Nonrecurring (Income) Expense |  |  |  |  | $ 10 |  | $ 7 |
[1] | Net income equals comprehensive income.
[2] | Net income equals comprehensive income.

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