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Business Acquisitions and Divestitures - Acquisitions (Details) - USD ($) $ in Millions | Nov. 01, 2022 | Oct. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
--- | --- | --- | --- | --- | ---
Discontinued Operations Disclosures |  |  |  |  |
Goodwill |  |  | $ 9,947 | $ 9,451 | $ 9,493
U.S. Pharmaceutical |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |
Goodwill |  |  | 4,050 | $ 3,923 | $ 3,963
Rx Savings Solutions, LLC | RxTs Segment |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |
Business acquisition, percentage of controlling interest in combined business | 100.00% |  |  |  |
Cash payment to acquire business | $ 600 |  |  |  |
Contingent consideration | 92 |  |  |  |
Other non-current liabilities |  |  | 9 |  |
Other current liabilities |  |  | $ 83 |  |
Acquired identifiable intangible assets | $ 229 |  |  |  |
Weighted average life of intangibles | 12 years |  |  |  |
Goodwill | $ 463 |  |  |  |
Rx Savings Solutions, LLC | RxTs Segment | Maximum |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |
Contingent consideration | $ 275 |  |  |  |
SCRI Oncology, LLC | U.S. Pharmaceutical |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |
Business acquisition, percentage of controlling interest in combined business |  | 51.00% |  |  |
Cash payment to acquire business |  | $ 173 |  |  |
Acquired identifiable intangible assets |  | $ 177 |  |  |
Weighted average life of intangibles |  | 17 years |  |  |
Goodwill |  | $ 120 |  |  |
Goodwill, expected tax deductible amount |  | 49 |  |  |
Noncontrolling interest |  | 225 |  |  |
SCRI Oncology, LLC | U.S. Pharmaceutical | SCRI |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |
Noncontrolling interest |  | 205 |  |  |
SCRI Oncology, LLC | U.S. Pharmaceutical | USOR |  |  |  |  |
Discontinued Operations Disclosures |  |  |  |  |
Noncontrolling interest |  | $ 20 |  |  |

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