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Long-Term Debt - CEI Term Loan A and CEI Revolving Credit Facility (Details)
 1 Months Ended 12 Months Ended
Jun. 28, 2024
USD ($)
Feb. 06, 2024
USD ($)
Feb. 06, 2023
USD ($)
Oct. 05, 2022
USD ($)
stepdown
Dec. 31, 2024
USD ($)
Nov. 30, 2024
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Jul. 20, 2020
USD ($)
Jul. 06, 2020
Long-term debt                      
Loss on extinguishment of debt             $ 89,000,000 $ 200,000,000 $ 85,000,000    
Senior Secured Notes Due 2025                      
Long-term debt                      
Loss on extinguishment of debt             48,000,000        
Senior Notes | CEI Term Loan B                      
Long-term debt                      
Debt instrument, face amount     $ 2,500,000,000                
Percentage of original principal amount amortization     0.25%                
Percentage of principal amount issued     99.00%                
Repayments of debt $ 100,000,000       $ 300,000,000            
Loss on extinguishment of debt             5,000,000        
Senior Notes | CEI Term Loan B | SOFR | Component One | Minimum                      
Long-term debt                      
Spread on variable rate (as a percent)           0.50%          
Senior Notes | CEI Term Loan B | Base rate                      
Long-term debt                      
Spread on variable rate (as a percent)           1.25%          
Senior Notes | CEI Term Loan B | Applicable Margin                      
Long-term debt                      
Spread on variable rate (as a percent)           2.25%          
Senior Notes | CEI Term Loan B-1                      
Long-term debt                      
Debt instrument, face amount   $ 2,900,000,000                  
Percentage of original principal amount amortization   0.25%                  
Percentage of principal amount issued   99.75%                  
Senior Notes | CEI Term Loan B-1 | SOFR | Component One | Minimum                      
Long-term debt                      
Spread on variable rate (as a percent)           0.50%          
Senior Notes | CEI Term Loan B-1 | Base rate                      
Long-term debt                      
Spread on variable rate (as a percent)           1.25%          
Senior Notes | CEI Term Loan B-1 | Applicable Margin                      
Long-term debt                      
Spread on variable rate (as a percent)           2.25%          
Senior Notes | CRC Senior Secured Notes                      
Long-term debt                      
Interest rate (as a percent)                     5.75%
Senior Notes | CEI Senior Secured Notes due 2025                      
Long-term debt                      
Interest rate (as a percent)                     6.25%
CEI Revolving Credit Facility                      
Long-term debt                      
Available borrowing capacity         2,100,000,000   2,100,000,000        
CEI Revolving Credit Facility | Line of Credit                      
Long-term debt                      
Credit facility                   $ 2,250,000,000  
Amount outstanding         84,000,000   84,000,000        
CEI Revolving Credit Facility, Permitted Use Reserves                      
Long-term debt                      
Accordion feature                   40,000,000  
CEI Revolving Credit Facility, Regulatory Purpose                      
Long-term debt                      
Amount outstanding         $ 46,000,000   $ 46,000,000        
Line of Credit                      
Long-term debt                      
Line of credit facility, commitment fee percentage       0.35%              
Line of Credit | SOFR                      
Long-term debt                      
Spread on variable rate (as a percent)       2.25%              
Line of Credit | SOFR | Component One                      
Long-term debt                      
Spread on variable rate (as a percent)       0.10%              
Line of Credit | SOFR | Component One | Minimum                      
Long-term debt                      
Spread on variable rate (as a percent)       0.00%              
Line of Credit | SOFR | Component Two                      
Long-term debt                      
Spread on variable rate (as a percent)       1.00%              
Line of Credit | Fed Funds Effective Rate Overnight Index Swap Rate | Component Two                      
Long-term debt                      
Spread on variable rate (as a percent)       0.50%              
Line of Credit | Base rate                      
Long-term debt                      
Spread on variable rate (as a percent)       1.25%              
Line of Credit | Letter of Credit                      
Long-term debt                      
Credit facility                   $ 388,000,000  
Line of Credit | Secured Debt                      
Long-term debt                      
Debt instrument, face amount       $ 750,000,000              
Interest rate (as a percent)       1.25%              
Number of stepdowns | stepdown       3              
Leverage ratio stepdown       0.25%              
Line of Credit | Revolving Credit Facility                      
Long-term debt                      
Number of stepdowns | stepdown       3              
Leverage ratio stepdown       0.05%