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Equity-Based Compensation - Unrecognized Compensation Cost (Details)
$ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Compensation Cost (In millions) $ 29
Performance units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Compensation Cost (In millions) $ 16
Weighted Average Period for Recognition (In years) 2 years 2 months 4 days
Phantom units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Compensation Cost (In millions) $ 13
Weighted Average Period for Recognition (In years) 1 year 11 months 19 days
Long Term Incentive Plan | Common Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares available for issuance | shares 4,987,106