Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments and Fair Value Measurements (Details)

v3.8.0.1
Financial Instruments and Fair Value Measurements (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Jun. 15, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative, Notional Amount     $ 125
Noncurrent assets:      
Derivative Asset, Noncurrent $ 2    
Recurring      
Current Assets, Fair Value Disclosure      
Cash equivalents 129 $ 42  
Noncurrent assets:      
Derivative Asset, Noncurrent 2 2  
Long-term liabilities      
Long-term Debt, Fair Value 4,974 5,132  
Recurring | Level 1      
Current Assets, Fair Value Disclosure      
Cash equivalents 129 42  
Recurring | Level 2      
Noncurrent assets:      
Derivative Asset, Noncurrent 2 2  
Long-term liabilities      
Long-term Debt, Fair Value $ 4,974 $ 5,132