Costs Associated with Rationalization Programs (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 252	$ 184	$ 230
New Charges	75	178	106
Restructuring reserve settled with cash and non cash considerations	(73)	(107)	(149)
Restructuring Reserve, Accrual Adjustment	(17)	(3)	(3)
Ending Balance	237	252	184
Associate Related Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance	229	166	212
New Charges	58	142	60
Restructuring reserve settled with cash and non cash considerations	(42)	(77)	(104)
Restructuring Reserve, Accrual Adjustment	(13)	(2)	(2)
Ending Balance	232	229	166
Other Exit Costs And Noncancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance	23	18	18
New Charges	17	36	46
Restructuring reserve settled with cash and non cash considerations	(31)	(30)	(45)
Restructuring Reserve, Accrual Adjustment	(4)	(1)	(1)
Ending Balance	$ 5	$ 23	$ 18