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Derivative and Financial Instruments - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Jan. 15, 2021
Derivative [Line Items]        
Percentage of term loans converted 60.00%      
Debt securities, available-for-sale, unrealized loss $ 5 $ 12    
Proceeds from sales and redemptions of investments in debt securities classified as available for sale 983 644    
Collateral was posted for derivative instruments in a liability position 0 42    
In Event of Lowered Credit Rating        
Derivative [Line Items]        
Derivative, liability position, aggregate fair value 181 $ 333    
In Event of Downgrade Below Investment Grade        
Derivative [Line Items]        
Additional collateral, either in the form of cash or letters of credit $ 152      
Maximum | Trade Receivables        
Derivative [Line Items]        
Terms of financial instruments and trade receivables 30 days      
Interest Rate Swap        
Derivative [Line Items]        
Unrealized gain (loss) on hedging activities $ 78      
Concho Resources Incorporated | Commodity        
Derivative [Line Items]        
Business combination, derivative liabilities assumed       $ 456
Gains (losses) from commodity derivatives     $ (305)  
Cash payment     $ 761