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Long-Term Debt (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Long-term debt instruments | $ 16,281 |  | $ 18,975
Debt due within one year | (1,650) |  | (2,694)
Fair market value adjustment for debt acquired in the Noble acquisition | 578 |  | 664
Reclassified from short-term debt | 4,543 |  | 4,050
Unamortized discounts and debt issuance costs | (19) |  | (23)
Finance lease liabilities | 574 |  | 403
Total long-term debt | 20,307 |  | 21,375
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
2024 | 1,650 |  |
2025 | 4,000 |  |
2026 | 2,250 |  |
2027 | 2,000 |  |
2028 | 600 |  |
Thereafter | $ 5,781 |  |
PDC Energy, Inc. |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
Debt issued |  | $ 1,500 |
Notes | Notes due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rate | 3.291% |  |
Long-term debt instruments | $ 1,650 |  | 1,650
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 |  | 4,000
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 |  | 2,250
Notes | Notes due 2027 |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rate | 2.379% |  |
Long-term debt instruments | $ 2,000 |  | 2,000
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 |  | 600
Notes | Notes due 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate | 3.25% |  |
Long-term debt instruments | $ 500 |  | 500
Notes | Notes due 2030 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate | 2.236% |  |
Long-term debt instruments | $ 1,500 |  | 1,500
Notes | Notes due 2040 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate | 2.978% |  |
Long-term debt instruments | $ 293 |  | 293
Notes | Notes due 2041 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate | 6.00% |  |
Long-term debt instruments | $ 397 |  | 397
Notes | Notes due 2043 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate | 5.25% |  |
Long-term debt instruments | $ 330 |  | 330
Notes | Notes due 2044 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate | 5.05% |  |
Long-term debt instruments | $ 222 |  | 222
Notes | Notes due 2047 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate | 4.95% |  |
Long-term debt instruments | $ 187 |  | 187
Notes | Notes due 2049 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate | 4.20% |  |
Long-term debt instruments | $ 237 |  | 237
Notes | Notes due 2050 |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rate | 2.763% |  |
Long-term debt instruments | $ 1,750 |  | 1,750
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 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt instruments | $ 0 |  | 2,600
Debentures | Debentures due 2031 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate | 8.625% |  |
Long-term debt instruments | $ 102 |  | 102
Debentures | Debentures due 2032 |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rate | 8.416% |  |
Long-term debt instruments | $ 183 |  | 183
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 |  | 60
Loans | Bank loans due 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt instruments | $ 0 |  | 91
Medium-term Notes | Medium-term notes, maturing from 2023 to 2038 |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rate | 6.599% |  |
Long-term debt instruments | $ 20 |  | $ 23
Medium-term Notes | Medium-term notes, maturing from 2023 to 2038 | Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rate | 5.331% |  |
Medium-term Notes | Medium-term notes, maturing from 2023 to 2038 | Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rate | 7.84% |  |
Six Point One Two Five Percent Senior Notes | PDC Energy, Inc. |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate |  | 6.125% |
Five Point Seven Five Percent Senior Notes | PDC Energy, Inc. |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate |  | 5.75% |

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