Restructuring and Other Costs (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Restructuring Cost and Reserve [Line Items]
Balance, beginning of period	$ 1	$ 31
Accruals	1	10
Payments	2	12
Balance, end of period	0	29
Severance Benefits and Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning of period	1	31
Accruals	1	6
Payments	2	10
Balance, end of period	0	27
professional fees restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning of period	0	0
Accruals	0	4
Payments	0	2
Balance, end of period	0	2
Asset Impairment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning of period	0
Accruals	0	0
Payments	0	0
Balance, end of period	0	0
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning of period	0	0
Accruals	0	0
Payments	0	0
Balance, end of period	$ 0	$ 0