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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]      
Accounts payable to related companies $ 31 $ 59  
Revenue 492 431 $ 303
Accounts Receivable, Related Parties, Current 159 111  
FGT [Member]      
Related Party Transaction [Line Items]      
Accounts Receivable, Related Parties, Current 50 25  
Other Related Parties [Member]      
Related Party Transaction [Line Items]      
Accounts Receivable, Related Parties, Current 31 44  
Phillips 66 Company [Member]      
Related Party Transaction [Line Items]      
Accounts Receivable, Related Parties, Current 36 42  
Traverse Rover LLC [Member]      
Related Party Transaction [Line Items]      
Accounts Receivable, Related Parties, Current $ 42 $ 0