Segments of Business - Segment Assets and Property, Plant and Equipment, Net by Geographical Area (Details) - USD ($) $ in Millions	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Segment assets
Cash and cash equivalents	$ 4,048	$ 5,341	$ 4,193	$ 2,456
Total	56,563	53,870
Property, plant and equipment, net
Total	2,278	2,045
United States
Property, plant and equipment, net
Total	1,500	1,273
Foreign
Property, plant and equipment, net
Total	778	772
Operating Segments
Segment assets
Total	50,160	47,263
Corporate
Segment assets
Cash and cash equivalents	4,048	5,341
Other	2,355	1,266
Distribution Solutions | Operating Segments
Segment assets
Total	47,088	43,982
Technology Solutions | Operating Segments
Segment assets
Total	$ 3,072	$ 3,281