Costs Associated with Rationalization Programs (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 252
New charges	10	16
Incurred	(31)
Reversed to the statement of operations	(3)
Ending Balance	228
Associate Related Costs
Restructuring Reserve [Roll Forward]
Beginning Balance	229
New charges	3
Incurred	(24)
Reversed to the statement of operations	(3)
Ending Balance	205
Other Exit Costs And Noncancelable Lease Costs
Restructuring Reserve [Roll Forward]
Beginning Balance	23
New charges	7
Incurred	(7)
Reversed to the statement of operations	0
Ending Balance	$ 23