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Debt - Public Debt (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
May 03, 2021
Jan. 15, 2021
Jun. 30, 2022
Jun. 30, 2022
Jun. 30, 2021
Debt Instrument [Line Items]          
Payment for early redemption of debt       $ 2 $ 22
5.400% Notes, due 2021          
Debt Instrument [Line Items]          
Early redemption of debt   $ 361      
Long-term debt, interest rate   5.40%      
Accrued interest paid   $ 5      
5.870% Notes, due 2022          
Debt Instrument [Line Items]          
Early redemption of debt $ 476        
Long-term debt, interest rate 5.87%        
Accrued interest paid $ 5        
Payment for early redemption of debt 503        
Early termination premium $ 23        
5.125% Notes, due 2024          
Debt Instrument [Line Items]          
Early redemption of debt     $ 60    
Long-term debt, interest rate     5.125% 5.125%  
Payment for early redemption of debt     $ 62    
Early termination premium     $ 2