Accrued Expenses and Other Long-Term Liabilities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Accrued Expenses
Defined benefit plan liabilities, current	$ 37	$ 54
Wage and other employee-related liabilities, current	259	172
Uncertain income tax position liabilities, current	0	0
Other tax liabilities, current	0	0
Environmental liabilities	39	40
Accrued interest expense, current	108	116
Derivative liabilities, current	25	39
Insurance lliability, current	13	13
Asset retirement obligations, current	6	20
Other accrued expenses, current	108	136
Accrued expenses	595	590
Other Long-Term Liabilities
Defined benefit plan liabilities, noncurrent	796	636
Wage and other employee-related liabilities, noncurrent	79	85
Uncertain income tax position liabilities, noncurrent	337	343
Other tax liabilities, noncurrent	103	106
Environmental liabilities, noncurrent	235	228
Derivative liabilities, noncurrent	0	0
Insurance liabilities, noncurrent	79	80
Asset retirement obligations, noncurrent	81	81
Other liabilities, noncurrent	171	208
Other long-term liabilities	$ 1,881	$ 1,767