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Held for Sale - Narrative (Details) € in Millions, £ in Millions, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2022 USD ($) | Mar. 31, 2022 USD ($) | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) | Apr. 30, 2022 GBP (£) | Jan. 31, 2022 USD ($) | Jan. 31, 2022 EUR (€) | Jul. 05, 2021 USD ($) | Jul. 05, 2021 EUR (€) | Nov. 01, 2020 USD ($)
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Assets held for sale |  | $ 4,516 | $ 4,516 | $ 12 |  |  |  |  |  |  |
Liabilities held for sale |  | 4,741 | 4,741 | 9 |  |  |  |  |  |  |
Charge for remeasurement to fair value |  |  | 1,509 | 0 | $ 0 |  |  |  |  |  |
German Pharmaceutical Wholesale Joint Venture |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Carrying value of investment in joint venture |  |  |  | 0 |  |  |  |  |  |  |
Held-for-sale |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Assets held for sale |  | 4,500 | 4,500 | 12 |  |  |  |  |  |  |
Liabilities held for sale |  | 4,700 | 4,700 | 9 |  |  |  |  |  |  |
International |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Charge for remeasurement to fair value |  |  |  | 58 | 275 |  |  |  |  |  |
German Wholesale Business |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Proceeds from collection of notes receivable |  |  |  | 291 |  |  |  |  |  |  |
Consideration receivable |  |  |  |  |  |  |  |  |  |  | $ 41
German Wholesale Business | International | Held-for-sale | Walgreens Boots Alliance Joint Venture | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Charge for remeasurement to fair value |  |  |  | 58 | 275 |  |  |  |  |  |
Ownership interest in Joint Venture (percent) |  |  |  |  |  |  |  |  |  |  | 30.00%
European Businesses (Disposal Group) | Held-for-sale |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Charge for remeasurement to fair value |  |  | 1,600 |  |  |  |  |  |  |  |
Austrian Business Operations | Held-for-sale |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Charge for remeasurement to fair value |  |  | 32 |  |  |  |  |  |  |  |
Proceeds from collection of notes receivable |  | 63 |  |  |  |  |  |  |  |  |
Net Assets |  | $ 272 | 272 |  |  |  |  |  |  |  |
Consideration agreed upon for sale of business |  |  |  |  |  |  | $ 276 | € 244 |  |  |
Held-for-sale | German Pharmaceutical Wholesale Joint Venture |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Charge for remeasurement to fair value |  |  |  | $ 58 | $ 275 |  |  |  |  |  |
E.U. Businesses (Disposal Group) | Held-for-sale |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Charge for remeasurement to fair value |  |  | 438 |  |  |  |  |  |  |  |
Gross purchase price |  |  |  |  |  |  |  |  | $ 1,400 | € 1,200 |
Accumulated other comprehensive loss in charge for remeasurement to fair value |  |  | 151 |  |  |  |  |  |  |  |
E.U. Businesses (Disposal Group) | International | Held-for-sale | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Charge for remeasurement to fair value |  |  | 383 |  |  |  |  |  |  |  |
U.K. Businesses (Disposal Group) | Held-for-sale |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Charge for remeasurement to fair value |  |  | 1,200 |  |  |  |  |  |  |  |
Accumulated other comprehensive loss in charge for remeasurement to fair value |  |  | 734 |  |  |  |  |  |  |  |
U.K. Businesses (Disposal Group) | Held-for-sale | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Gross purchase price | $ 144 |  |  |  |  | £ 110 |  |  |  |  |
Proceeds from collection of notes receivable | $ 118 |  |  |  |  |  |  |  |  |  |
U.K. Businesses (Disposal Group) | International | Held-for-sale | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |  |  |  |  |  |  |
Charge for remeasurement to fair value |  |  | $ 1,100 |  |  |  |  |  |  |  |

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