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Long-term Debt and Finance Leases - Senior Notes Issuance and Redemptions (Details) - USD ($)
12 Months Ended
Aug. 24, 2021
Aug. 23, 2021
Dec. 02, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Aug. 02, 2016
Debt Instrument [Line Items]              
Principal Repurchased       $ 1,855,000,000      
Cash Paid $ 1,900,000,000     1,949,000,000      
Loss on debt extinguishment $ 77,000,000     (77,000,000) $ (9,000,000) $ (51,000,000)  
Write off of deferred debt issuance cost       $ 12,000,000      
Senior Notes, due 2032              
Debt Instrument [Line Items]              
Aggregate principal amount   $ 1,100,000,000          
Interest rate, stated percentage   3.875%   3.875%      
Increase in basis points if sustainability targets are not achieved   0.25%          
Senior Notes, due 2026              
Debt Instrument [Line Items]              
Interest rate, stated percentage 7.25%     7.25%      
Principal Repurchased $ 1,000,000,000     $ 1,000,000,000      
Cash Paid       $ 1,056,000,000      
Senior Notes, due 2027              
Debt Instrument [Line Items]              
Interest rate, stated percentage 6.625%     6.625%      
Principal Repurchased $ 355,000,000     $ 855,000,000      
Cash Paid       $ 893,000,000      
Recourse Debt | Senior Notes, due 2032              
Debt Instrument [Line Items]              
Interest rate, stated percentage       3.875%      
Recourse Debt | Senior Notes, due 2026              
Debt Instrument [Line Items]              
Interest rate, stated percentage       7.25%      
Recourse Debt | Senior Notes, due 2027              
Debt Instrument [Line Items]              
Interest rate, stated percentage       6.625%     6.625%
Recourse Debt | 3.375% Senior Notes Due 2029              
Debt Instrument [Line Items]              
Aggregate principal amount     $ 500,000,000        
Interest rate, stated percentage     3.375% 3.375%      
Recourse Debt | Senior Notes, due 2031              
Debt Instrument [Line Items]              
Aggregate principal amount     $ 1,000,000,000        
Interest rate, stated percentage     3.625% 3.625%      
Recourse Debt | Senior Secured First Lien Notes due 2025 to 2027              
Debt Instrument [Line Items]              
Aggregate principal amount     $ 1,400,000,000        
Recourse Debt | Senior Secured First Lien Notes, due 2025              
Debt Instrument [Line Items]              
Aggregate principal amount     $ 500,000,000        
Interest rate, stated percentage     2.00% 2.00%      
Recourse Debt | Senior Secured First Lien Notes, due 2027              
Debt Instrument [Line Items]              
Aggregate principal amount     $ 900,000,000        
Interest rate, stated percentage     2.45% 2.45%      
Increase in basis points if sustainability targets are not achieved     0.25%