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Indebtedness - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]      
Loss on repurchase of debt $ 0 $ 138 $ 0
Unsecured Senior Notes      
Debt Instrument [Line Items]      
Maximum percentage redeemable on secured debt 40.00%    
Unsecured Senior Notes      
Debt Instrument [Line Items]      
Repayments of debt $ 0 100  
Amount of principal redeemed $ 0 2,298  
Loss on repurchase of debt   $ 138