Restructuring Charges (New Plan) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 78	$ 0
Restructuring Charges New Plan	78
Restructuring and Related Cost, Expected Cost	500
Transfer to New Plan	39
Restructuring and Related Cost, Cost Incurred to Date	78
Restructuring Reserve, Settled with Cash	(25)
Restructuring Reserve, Settled without Cash	(14)
Restructuring Reserve, Accrual Adjustment	0
Termination costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	62	0
Restructuring and Related Cost, Expected Cost	310
Transfer to New Plan	22
Restructuring and Related Cost, Cost Incurred to Date	56
Restructuring Reserve, Settled with Cash	(15)
Restructuring Reserve, Settled without Cash	(1)
Restructuring Reserve, Accrual Adjustment	0
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	16	0
Restructuring and Related Cost, Expected Cost	190
Transfer to New Plan	17
Restructuring and Related Cost, Cost Incurred to Date	22
Restructuring Reserve, Settled with Cash	(10)
Restructuring Reserve, Settled without Cash	(13)
Restructuring Reserve, Accrual Adjustment	$ 0