Divestiture of Businesses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Noncash or Part Noncash Divestitures [Line Items]
Gain from sale of business, pre-tax			$ 103	$ 0
ZEE Medical Business | Operating Segments | Distribution Solutions
Noncash or Part Noncash Divestitures [Line Items]
Proceeds from divestiture of businesses	$ 134
Gain from sale of business, pre-tax	52
Gain from sale of business, after tax	$ 29
Nurse Triage | Operating Segments | Technology Solutions
Noncash or Part Noncash Divestitures [Line Items]
Proceeds from divestiture of businesses		$ 84
Gain from sale of business, pre-tax		51	$ 51
Gain from sale of business, after tax		$ 38