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Long-Term Debt - CRC Notes (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 15, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Oct. 16, 2017
Long-term debt          
Interest rate (as a percent)   4.30%      
Loss on extinguishment of debt   $ 236 $ 197 $ 8  
CRC Notes          
Long-term debt          
Interest rate (as a percent)   5.25%      
CRC Notes | Senior Notes          
Long-term debt          
Long-term debt, gross         $ 1,700
5.25% CRC Notes due 2025 | Senior Notes          
Long-term debt          
Loss on extinguishment of debt $ 199