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Fair Value Measurement - Schedule of Fair Value Hierarchy for Gross Financial Assets and Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity derivatives $ 975 $ 2,037
Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments in debt securities 1,250 1,222
Commodity derivatives 975 2,037
Total assets 2,225 3,259
Commodity derivatives 897 2,010
Total liabilities 897 2,010
Fair Value, Measurements, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments in debt securities 275 178
Commodity derivatives 479 958
Total assets 754 1,136
Commodity derivatives 509 906
Total liabilities 509 906
Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments in debt securities 975 1,044
Commodity derivatives 366 951
Total assets 1,341 1,995
Commodity derivatives 370 843
Total liabilities 370 843
Fair Value, Measurements, Recurring | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments in debt securities 0 0
Commodity derivatives 130 128
Total assets 130 128
Commodity derivatives 18 261
Total liabilities $ 18 $ 261