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v3.24.1.u1

Acquisitions, Development and Divestitures - Development (Details) $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Nov. 06, 2023 MW | Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2023 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |
Transition Service Agreement Cost |  |  | $ 48 |  | $ 58 |  |
Goodwill |  |  | 2,247 |  |  |  | $ 2,247
Operating Revenues from external customers |  |  | 2,304 |  | 2,415 |  |
Net income (loss) |  |  | 307 |  | 285 |  |
Indemnification for Safari sale/leaseback |  |  | 25 |  |  |  |
Louisville Gas And Electric Co [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill |  |  | 389 |  |  |  | 389
Operating Revenues from external customers |  |  | 476 |  | 474 |  |
Net income (loss) |  |  | 93 | [1] | 86 |  |
New NGCC LG&E Planned Ownership Percentage |  | 31.00% |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities Power | MW |  | 640 |  |  |  |  |
Kentucky Utilities Co [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill |  |  | 607 |  |  |  | $ 607
Operating Revenues from external customers |  |  | 525 |  | 499 |  |
Net income (loss) | [2] |  | 108 |  | 88 |  |
New NGCC KU Planned Ownership Percentage |  | 69.00% |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities Power | MW |  | 640 |  |  |  |  |
Narragansett Electric |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Total cash consideration |  |  |  |  |  | $ 3,800 |
Rhode Island Regulated |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Operating Revenues from external customers |  |  | 549 |  | 565 |  |
Net income (loss) |  |  | 64 |  | 54 |  |
Corporate and Other [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Operating Revenues from external customers |  |  | 1 |  | (1) |  |
Net income (loss) |  |  | (96) |  | (73) |  |
Rhode Island Energy | Rhode Island Energy TSA |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Other Nonrecurring (Income) Expense |  |  | 81 |  | 54 |  |
Rhode Island Energy | Accrual for TSA Markup |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Other Nonrecurring (Income) Expense |  |  | 1 |  | $ 2 |  |
LGE [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities Power | MW |  | 640 |  |  |  |  |
KU [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities Power | MW |  | 640 |  |  |  |  |
LKE [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
ExpectedCapitalCostOfExpansionProject |  |  | $ 1,000 |  |  |  |
[1] | Net income equals comprehensive income.
[2] | Net income equals comprehensive income.

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