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Investments (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Mar. 31, 2019
FTS International, Inc.        
Schedule of Equity Method Investments [Line Items]        
Book value   $ 23    
Other than temporary impairment   $ 23    
JWH Midstream LLC (JWH)        
Schedule of Equity Method Investments [Line Items]        
Business acquisition, percent acquired       50.00%
Equity method investments       $ 17
Payments to terminate involvement in partnership     $ 7  
Impairment expense $ 23