Costs Associated with Rationalization Programs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 119	$ 237	$ 252
New charges	116	128	75
Incurred, Net of Foreign Currency Translation	(131)	(235)	(73)
Reversed to the Statement of Operations	(1)	(11)	(17)
Ending Balance	103	119	237
Associate-related Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance	117	232	229
New charges	86	76	58
Incurred, Net of Foreign Currency Translation	(106)	(186)	(42)
Reversed to the Statement of Operations	(1)	(5)	(13)
Ending Balance	96	117	232
Foreign currency translation	(12)	(18)	7
Other Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance	2	5	23
New charges	30	52	17
Incurred, Net of Foreign Currency Translation	(25)	(49)	(31)
Reversed to the Statement of Operations	0	(6)	(4)
Ending Balance	7	2	5
Foreign currency translation	$ 0	$ 0	$ 0