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Restructuring, Impairment and Related Charges - Summary of Restructuring Activity (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | $ 157 |
Restructuring, impairment, and related charges | $ 40 | $ 42 | 156 | $ 110
Non-cash charges |  |  | (50) |
Cash payments |  |  | (132) |
Other |  |  | 1 |
Ending balance | 132 |  | 132 |
International |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring, impairment, and related charges | 131 |  | 189 |
Operating Segments | U.S. Pharmaceutical |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | 29 |
Restructuring, impairment, and related charges | 6 | 7 | 18 | 9
Non-cash charges |  |  | 0 |
Cash payments |  |  | (24) |
Other |  |  | 0 |
Ending balance | 23 |  | 23 |
Operating Segments | International |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | 66 |
Restructuring, impairment, and related charges | 16 | 6 | 74 | 22
Non-cash charges |  |  | (40) |
Cash payments |  |  | (24) |
Other |  |  | (1) |
Ending balance | 75 |  | 75 |
Operating Segments | Medical-Surgical Solutions |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | 22 |
Restructuring, impairment, and related charges | (2) | 6 | 4 | 12
Non-cash charges |  |  | (1) |
Cash payments |  |  | (19) |
Other |  |  | 0 |
Ending balance | 6 |  | 6 |
Operating Segments | Prescription Technology Solutions |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | 1 |
Restructuring, impairment, and related charges | 0 | 0 | 0 | 0
Non-cash charges |  |  | 0 |
Cash payments |  |  | (1) |
Other |  |  | 0 |
Ending balance | 0 |  | 0 |
Corporate |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | 39 |
Restructuring, impairment, and related charges | 20 | $ 23 | 60 | $ 67
Non-cash charges |  |  | (9) |
Cash payments |  |  | (64) |
Other |  |  | 2 |
Ending balance | 28 |  | 28 |
Other accrued liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | 118 |
Ending balance | 101 |  | 101 |
Other noncurrent liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | 39 |
Ending balance | $ 31 |  | $ 31 |

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