v3.20.2
Debt (Fair Value of Debt) (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt $ 10,901 $ 11,857
Senior Unsecured Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 3,042 3,663
First Lien Term Loans    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 3,155 3,167
First Lien Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 2,408 2,835
Reported Value Measurement [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 10,975 11,571
Reported Value Measurement [Member] | Senior Unsecured Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 3,042 3,663
Reported Value Measurement [Member] | First Lien Term Loans    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 3,155 3,167
Reported Value Measurement [Member] | First Lien Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 2,408 2,835
Reported Value Measurement [Member] | Project financing, notes payable and other    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt [1] 419 817
Reported Value Measurement [Member] | CCFC Term Loan    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 962 967
Reported Value Measurement [Member] | GPC Term Loan [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 867 0
Reported Value Measurement [Member] | Revolving facilities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 122 122
Level 2 | Senior Unsecured Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 3,027 3,764
Level 2 | First Lien Term Loans    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 3,081 3,238
Level 2 | First Lien Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 2,404 2,929
Level 2 | CCFC Term Loan    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 941 982
Level 2 | GPC Term Loan [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 900 0
Level 3 | Project financing, notes payable and other    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt [1] 426 822
Level 3 | Revolving facilities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt $ 122 $ 122
[1] Excludes an agreement that is accounted for as a failed sale-leaseback transaction under U.S. GAAP.