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Long-Term Debt (Details) - USD ($)
1 Months Ended 12 Months Ended
Oct. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Feb. 24, 2022
Debt Instrument [Line Items]        
Long-term debt instruments   $ 27,141,000,000 $ 33,507,000,000  
Debt due within one year   (4,946,000,000) (2,600,000,000)  
Fair market value adjustment for debt acquired in the Noble Energy acquisition   741,000,000 1,690,000,000  
Reclassified from short-term debt   7,759,000,000 9,825,000,000  
Unamortized discounts and debt issuance costs   (31,000,000) (102,000,000)  
Finance lease liabilities   449,000,000 447,000,000  
Total long-term debt   31,113,000,000 42,767,000,000  
Long-term Debt, Fiscal Year Maturity [Abstract]        
2021   4,946,000,000    
2022   5,785,000,000    
2023   1,697,000,000    
2024   4,082,000,000    
2025   2,250,000,000    
Thereafter   8,381,000,000    
Loss on extinguishment of debt   $ 260,000,000    
Notes due 2022 | Subsequent Event        
Long-term Debt, Fiscal Year Maturity [Abstract]        
Redemption amount       $ 1,400,000,000
Notes | Notes due 2022        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   2.179%    
Long-term debt instruments   $ 3,800,000,000 3,800,000,000  
Notes | Notes due 2022 | Minimum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   0.333%    
Notes | Notes due 2022 | Maximum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   2.498%    
Notes | Notes due 2023        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   2.377%    
Long-term debt instruments   $ 4,800,000,000 4,800,000,000  
Notes | Notes due 2023 | Minimum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   0.426%    
Notes | Notes due 2023 | Maximum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   7.25%    
Notes | Notes due 2024        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   3.291%    
Long-term debt instruments   $ 1,650,000,000 1,650,000,000  
Notes | Notes due 2024 | Minimum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   2.895%    
Notes | Notes due 2024 | Maximum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   3.90%    
Notes | Notes due 2025        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   1.724%    
Long-term debt instruments   $ 4,000,000,000 4,000,000,000  
Notes | Notes due 2025 | Minimum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   0.687%    
Notes | Notes due 2025 | Maximum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   3.326%    
Notes | Notes due 2026        
Debt Instrument [Line Items]        
Interest rate   2.954%    
Long-term debt instruments   $ 2,250,000,000 2,250,000,000  
Notes | Notes due 2027        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   2.379%    
Long-term debt instruments   $ 2,000,000,000 2,000,000,000  
Notes | Notes due 2027 | Minimum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   1.018%    
Notes | Notes due 2027 | Maximum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   8.00%    
Notes | Notes due 2028        
Debt Instrument [Line Items]        
Interest rate   3.85%    
Long-term debt instruments   $ 600,000,000 600,000,000  
Notes | Notes due 2029        
Debt Instrument [Line Items]        
Interest rate   3.25%    
Long-term debt instruments   $ 500,000,000 500,000,000  
Notes | Notes due 2030        
Debt Instrument [Line Items]        
Interest rate   2.236%    
Long-term debt instruments   $ 1,500,000,000 1,500,000,000  
Notes | Notes due 2040        
Debt Instrument [Line Items]        
Interest rate   2.978%    
Long-term debt instruments   $ 293,000,000 500,000,000  
Notes | Notes due 2041        
Debt Instrument [Line Items]        
Interest rate   6.00%    
Long-term debt instruments   $ 397,000,000 850,000,000  
Notes | Notes due 2043        
Debt Instrument [Line Items]        
Interest rate   5.25%    
Long-term debt instruments   $ 330,000,000 1,000,000,000  
Notes | Notes due 2044        
Debt Instrument [Line Items]        
Interest rate   5.05%    
Long-term debt instruments   $ 222,000,000 850,000,000  
Notes | Notes due 2047        
Debt Instrument [Line Items]        
Interest rate   4.95%    
Long-term debt instruments   $ 187,000,000 500,000,000  
Notes | Notes due 2049        
Debt Instrument [Line Items]        
Interest rate   4.20%    
Long-term debt instruments   $ 237,000,000 500,000,000  
Notes | Notes due 2050        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   2.763%    
Long-term debt instruments   $ 1,750,000,000 1,750,000,000  
Notes | Notes due 2050 | Minimum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   2.343%    
Notes | Notes due 2050 | Maximum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   3.078%    
Notes | Notes due 2021        
Debt Instrument [Line Items]        
Long-term debt instruments   $ 0 2,600,000,000  
Floating Rate Notes        
Long-term Debt, Fiscal Year Maturity [Abstract]        
Loss on extinguishment of debt $ 260,000,000      
Floating Rate Notes | Floating rate notes due 2022        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   0.536%    
Long-term debt instruments   $ 1,000,000,000 1,000,000,000  
Floating Rate Notes | Floating rate notes due 2022 | Minimum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   0.264%    
Floating Rate Notes | Floating rate notes due 2022 | Maximum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   0.705%    
Floating Rate Notes | Floating rate notes due 2023        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   0.617%    
Long-term debt instruments   $ 800,000,000 800,000,000  
Floating Rate Notes | Floating rate notes due 2023 | Minimum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   0.354%    
Floating Rate Notes | Floating rate notes due 2023 | Maximum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   1.054%    
Debentures | Debentures due 2031        
Debt Instrument [Line Items]        
Interest rate   8.625%    
Long-term debt instruments   $ 102,000,000 108,000,000  
Debentures | Debentures due 2032        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   8.416%    
Long-term debt instruments   $ 183,000,000 222,000,000  
Debentures | Debentures due 2032 | Minimum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   8.00%    
Debentures | Debentures due 2032 | Maximum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   8.625%    
Debentures | Debentures due 2097        
Debt Instrument [Line Items]        
Interest rate   7.25%    
Long-term debt instruments   $ 60,000,000 84,000,000  
Loans | Bank loans due 2022 - 2023        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   1.765%    
Long-term debt instruments   $ 239,000,000 1,402,000,000  
Long-term Debt, Fiscal Year Maturity [Abstract]        
Extinguishment of debt   $ 1,100,000,000    
Loans | Bank loans due 2022 - 2023 | Minimum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   1.52%    
Loans | Bank loans due 2022 - 2023 | Maximum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   1.92%    
Loans | 3.400% loan        
Debt Instrument [Line Items]        
Interest rate   3.40%    
Long-term debt instruments   $ 218,000,000 218,000,000  
Medium-term Notes        
Debt Instrument [Line Items]        
Long-term debt instruments 3,400,000,000      
Long-term Debt, Fiscal Year Maturity [Abstract]        
Debt issued $ 2,600,000,000      
Medium-term Notes | Medium-term notes, maturing from 2023 to 2038        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   4.485%    
Long-term debt instruments   $ 23,000,000 $ 23,000,000  
Medium-term Notes | Medium-term notes, maturing from 2023 to 2038 | Minimum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   0.08%    
Medium-term Notes | Medium-term notes, maturing from 2023 to 2038 | Maximum        
Debt Instrument [Line Items]        
Weighted Average Interest Rate   7.90%