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Restructuring and Asset Impairment Charges - Summary of Restructuring Activity (Details) - Strategic Growth Initiative Plan - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2018
Restructuring Reserve [Roll Forward] |  |
Balance March 31, 2018 |  | $ 0
Net restructuring charges recognized | $ 53 | 111
Non-cash charges |  | (22)
Cash Payments |  | (31)
Balance September 30, 2018 | 58 | 58
U.S. Pharmaceutical and Specialty Solutions |  |
Restructuring Reserve [Roll Forward] |  |
Balance March 31, 2018 |  | 0
Net restructuring charges recognized | 5 | 13
Non-cash charges |  | (4)
Cash Payments |  | (6)
Balance September 30, 2018 | 3 | 3
Medical-Surgical Solutions |  |
Restructuring Reserve [Roll Forward] |  |
Balance March 31, 2018 |  | 0
Net restructuring charges recognized | 6 | 18
Non-cash charges |  | (1)
Cash Payments |  | (7)
Balance September 30, 2018 | 10 | 10
Other |  |
Restructuring Reserve [Roll Forward] |  |
Balance March 31, 2018 |  | 0
Net restructuring charges recognized | 42 | 80
Non-cash charges |  | (17)
Cash Payments |  | (18)
Balance September 30, 2018 | $ 45 | $ 45

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