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v3.24.3

Fair Value Measurements (Assets and Liabilities Accounted for at Fair Value on Recurring Basis) (Detail) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash collateral netted with derivative liabilities | $ 13 | $ 29
Fair Value, Recurring | Commodity derivatives |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Commodity derivative instruments, assets - netting and collateral | (282) | (220)
Derivative asset, net carrying value on balance sheet | 21 | 24
Commodity derivative instruments, assets - collateral pledged not offset | 36 | 73
Commodity derivative instruments, liabilities - netting and collateral | (295) | (249)
Derivative liability, net carrying value on balance sheet | 0 | 0
Commodity derivative instruments, liabilities - collateral pledged not offset | 0 | 0
Fair Value, Recurring | Embedded derivatives in commodity contracts |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Commodity derivative instruments, liabilities - netting and collateral | 0 | 0
Derivative liability, net carrying value on balance sheet | 69 | 61
Commodity derivative instruments, liabilities - collateral pledged not offset | 0 | 0
Fair Value, Recurring | Level 1 | Commodity derivatives |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Commodity derivative instruments, assets - gross | 302 | 244
Commodity derivative instruments, liabilities - gross | 295 | 249
Fair Value, Recurring | Level 1 | Embedded derivatives in commodity contracts |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Commodity derivative instruments, liabilities - gross | 0 | 0
Fair Value, Recurring | Level 2 | Commodity derivatives |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Commodity derivative instruments, assets - gross | 1 | 0
Commodity derivative instruments, liabilities - gross | 0 | 0
Fair Value, Recurring | Level 2 | Embedded derivatives in commodity contracts |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Commodity derivative instruments, liabilities - gross | 0 | 0
Fair Value, Recurring | Level 3 | Commodity derivatives |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Commodity derivative instruments, assets - gross | 0 | 0
Commodity derivative instruments, liabilities - gross | 0 | 0
Fair Value, Recurring | Level 3 | Embedded derivatives in commodity contracts |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Commodity derivative instruments, liabilities - gross | $ 69 | $ 61

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