Divestiture of Businesses (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Aug. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Noncash or Part Noncash Divestitures [Line Items]
Gain from sale of business, pre-tax				$ 102	$ 6
ZEE Medical Business
Noncash or Part Noncash Divestitures [Line Items]
Gain from sale of business, pre-tax				51
Distribution Solutions | ZEE Medical Business
Noncash or Part Noncash Divestitures [Line Items]
Proceeds from divestiture of businesses	$ 134
Gain from sale of business, pre-tax				51
Gain from sale of business, after tax		$ 33		$ 29
Technology Solutions | Nurse Triage
Noncash or Part Noncash Divestitures [Line Items]
Proceeds from divestiture of businesses			$ 84
Gain from sale of business, pre-tax			51
Gain from sale of business, after tax			$ 38