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Held for Sale - Narrative (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Sep. 05, 2024 | Sep. 30, 2024 | Sep. 30, 2024 | Sep. 30, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Charge to remeasure disposal group |  |  | $ 638 | $ 0
Held-for-sale | Canadian retail disposal group |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Purchase price | $ 148 |  |  |
Cash proceeds from divestiture | 27 |  |  |
Noncash divestiture, amount of consideration received | $ 121 |  |  |
Noncash divestiture payable period (in years) | 6 years |  |  |
Assets held for sale |  | $ 631 | 631 |
Liabilities held for sale |  | 371 | 371 |
Charge to remeasure disposal group |  | 643 | 643 |
Accumulated other comprehensive loss in charge for remeasurement to fair value |  | $ 15 | $ 15 |

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