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Segments of Business - Segment Assets and Property, Plant and Equipment, Net by Geographical Area (Details) - USD ($) $ in Millions | Mar. 31, 2020 | Mar. 31, 2019
--- | --- | ---
Segment assets |  |
Total | $ 61,247 | $ 59,672
Property, plant and equipment, net |  |
Total | 2,365 | 2,548
United States |  |
Property, plant and equipment, net |  |
Total | 1,642 | 1,698
Foreign |  |
Property, plant and equipment, net |  |
Total | 723 | 850
Operating Segments | U.S. Pharmaceutical and Specialty Solutions |  |
Segment assets |  |
Total | 34,927 | 32,310
Operating Segments | European Pharmaceutical Solutions |  |
Segment assets |  |
Total | 9,499 | 7,829
Operating Segments | Medical-Surgical Solutions |  |
Segment assets |  |
Total | 5,395 | 5,260
Operating Segments | Other |  |
Segment assets |  |
Total | 7,944 | 11,006
Corporate |  |
Segment assets |  |
Total | $ 3,482 | $ 3,267

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