v3.3.1.900
Commitments And Contingencies Environmental Matters (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Environmental Exit Cost [Line Items]    
Accrual for Environmental Loss Contingencies $ 4 $ 5
Accrued Environmental Loss Contingencies, Noncurrent 3 4
Accrued Liabilities    
Environmental Exit Cost [Line Items]    
Accrued Environmental Loss Contingencies, Current 1 1
Other Long-Term Liabilities    
Environmental Exit Cost [Line Items]    
Accrued Environmental Loss Contingencies, Noncurrent 3 4
Discontinued Operations | Liabilities Held for Sale    
Environmental Exit Cost [Line Items]    
Accrual for Environmental Loss Contingencies $ 6 $ 16