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Debt - Schedule of Long-Term Debt (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Jan. 31, 2023
Dec. 31, 2022
Debt Instrument [Line Items]      
Other $ (17)   $ (19)
Total long-term debt $ 3,988   4,162
5.125% Notes, due 2024      
Debt Instrument [Line Items]      
Long-term debt, interest rate 5.125% 5.125%  
Amount outstanding $ 905   1,081
6.875% Notes, due 2025      
Debt Instrument [Line Items]      
Long-term debt, interest rate 6.875%    
Amount outstanding $ 600   600
5.900% Notes, due 2027      
Debt Instrument [Line Items]      
Long-term debt, interest rate 5.90%    
Amount outstanding $ 625   625
6.750% Bonds, due 2028      
Debt Instrument [Line Items]      
Long-term debt, interest rate 6.75%    
Amount outstanding $ 300   300
3.000% Notes, due 2029      
Debt Instrument [Line Items]      
Long-term debt, interest rate 3.00%    
Amount outstanding $ 700   700
5.950% Notes, due 2037      
Debt Instrument [Line Items]      
Long-term debt, interest rate 5.95%    
Amount outstanding $ 625   625
4.750% Iowa Finance Authority Loan, due 2042      
Debt Instrument [Line Items]      
Long-term debt, interest rate 4.75%    
Amount outstanding $ 250   $ 250