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Restructuring, Impairment and Related Charges - Summary of Restructuring Activity (Details) - Fiscal 2019 Initiatives - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | $ 150 |
Restructuring, impairment and related charges | $ 43 | $ 75 | 66 | $ 144
Non-cash charges |  |  | (12) |
Cash Payments |  |  | (50) |
Other |  |  | (13) |
Ending balance | 141 |  | 141 |
Operating Segments | U.S. Pharmaceutical and Specialty Solutions |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | 31 |
Restructuring, impairment and related charges | 2 | 5 | 1 | 13
Non-cash charges |  |  | 0 |
Cash Payments |  |  | (3) |
Other |  |  | 0 |
Ending balance | 29 |  | 29 |
Operating Segments | European Pharmaceutical Solutions |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | 38 |
Restructuring, impairment and related charges | 10 |  | 13 |
Non-cash charges |  |  | (6) |
Cash Payments |  |  | (10) |
Other |  |  | (1) |
Ending balance | 34 |  | 34 |
Operating Segments | Medical-Surgical Solutions |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | 15 |
Restructuring, impairment and related charges | 3 | 6 | 6 | 18
Non-cash charges |  |  | (1) |
Cash Payments |  |  | (1) |
Other |  |  | 0 |
Ending balance | 19 |  | 19 |
Operating Segments | Other |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | 29 |
Restructuring, impairment and related charges | 1 | 42 | 2 | 80
Non-cash charges |  |  | 0 |
Cash Payments |  |  | (14) |
Other |  |  | (7) |
Ending balance | 10 |  | 10 |
Corporate |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning balance |  |  | 37 |
Restructuring, impairment and related charges | 27 | $ 22 | 44 | $ 33
Non-cash charges |  |  | (5) |
Cash Payments |  |  | (22) |
Other |  |  | (5) |
Ending balance | $ 49 |  | $ 49 |

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