Restructuring and Other Costs (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Restructuring Cost and Reserve [Line Items]
Balance, beginning of period
Accruals	38	0	67	0
Payments			(49)
Balance, end of period	18		18
Severance Benefits and Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning of period
Accruals			50
Payments			(39)
Balance, end of period	11		11
Professional Fees [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning of period
Accruals			14
Payments			(7)
Balance, end of period	7		7
Asset Impairment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning of period
Accruals			3
Payments			(3)
Balance, end of period	$ 0		$ 0