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Related Party Transactions (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Related Party Transaction [Line Items]      
Operating revenues and other income $ 0 $ 0 $ 0
Affiliated Entity [Member]      
Related Party Transaction [Line Items]      
Operating revenues and other income 89 98 107
Purchases 38 98 99
Operating expenses and selling, general and administrative expenses 65 60 59
Net interest (income) expense * $ (13) $ (14) $ (13)