Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Accrued liabilities and deferred income	$ 12	$ 18
Allowance for doubtful accounts	3	6
Net operating loss carry forwards and tax credit carry forwards	202	231
Pension liability	62	61
Other assets	31	16
Less: Valuation allowance	(302)	(323)
Total deferred tax assets	8	9
Deferred tax liabilities
Depreciation and amortization	(41)	(40)
Other	(4)	(2)
Total deferred tax liabilities	(45)	(42)
Net deferred tax liability	$ (37)	$ (33)