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Segments of Business - Segment Assets and Property, Plant and Equipment, Net by Geographical Area (Details) - USD ($) $ in Millions | Mar. 31, 2018 | Mar. 31, 2017
--- | --- | ---
Segment assets |  |
Total | $ 60,381 | $ 60,969
Property, plant and equipment, net |  |
Total | 2,464 | 2,292
United States |  |
Property, plant and equipment, net |  |
Total | 1,529 | 1,383
Foreign |  |
Property, plant and equipment, net |  |
Total | 935 | 909
Operating Segments | Distribution Solutions |  |
Segment assets |  |
Total | 53,915 | 52,322
Operating Segments | Technology Solutions |  |
Segment assets |  |
Total | 3,735 | 4,995
Corporate |  |
Segment assets |  |
Total | $ 2,731 | $ 3,652

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