Derivatives and Other Financial Instruments - Schedule of Reconciliation of Activity for Derivative Contracts (Detail) - USD ($)
$ in Millions |
3 Months Ended |
6 Months Ended |
Jun. 30, 2026 |
Jun. 30, 2026 |
| Financial Contracts [Member] |
|
|
| Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |
|
|
| Fair value measurement, Assets, Beginning balance |
$ 40
|
$ 20
|
| Settlements and other |
5
|
14
|
| Settlements and other |
(1)
|
(1)
|
| Fair value measurement, Assets, Ending balance |
16
|
16
|
| Fair value measurement, Liabilities, Beginning balance |
0
|
0
|
| Other comprehensive loss (unrealized) |
$ 0
|
$ 0
|
| Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Liability, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
|
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
|
| Fair value measurement, Liabilities, Ending balance |
$ 22
|
$ 22
|
| Financial Contracts [Member] | Sales [Member] |
|
|
| Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |
|
|
| Fair value measurement, Liabilities |
$ 0
|
$ 0
|
| Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |
Revenue from Contract with Customer, Excluding Assessed Tax
|
Revenue from Contract with Customer, Excluding Assessed Tax
|
| Financial Contracts [Member] | Other Income, Net [Member] |
|
|
| Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |
|
|
| Fair value measurement, Assets |
$ (29)
|
$ (18)
|
| Fair value measurement, Liabilities |
$ 23
|
$ 23
|
| Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |
Nonoperating Income (Expense)
|
Nonoperating Income (Expense)
|
| Financial Contracts [Member] | Other Income, Net [Member] |
|
|
| Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |
|
|
| Fair value measurement, Assets |
$ (29)
|
$ (18)
|
| Power Contract [Member] |
|
|
| Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |
|
|
| Settlements and other |
0
|
0
|
| Fair value measurement, Liabilities, Beginning balance |
1,246
|
1,354
|
| Other comprehensive loss (unrealized) |
$ 99
|
$ 107
|
| Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Liability, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
|
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
|
| Fair value measurement, Liabilities, Ending balance |
$ 1,200
|
$ 1,200
|
| Power Contract [Member] | Sales [Member] |
|
|
| Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |
|
|
| Fair value measurement, Liabilities |
$ (145)
|
$ (261)
|
| Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |
Revenue from Contract with Customer, Excluding Assessed Tax
|
Revenue from Contract with Customer, Excluding Assessed Tax
|
| Power Contract [Member] | Other Income, Net [Member] |
|
|
| Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |
|
|
| Fair value measurement, Liabilities |
$ 0
|
$ 0
|
| Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |
Nonoperating Income (Expense)
|
Nonoperating Income (Expense)
|
| Embedded Credit Derivative [Member] |
|
|
| Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |
|
|
| Settlements and other |
$ 0
|
$ 0
|
| Fair value measurement, Liabilities, Beginning balance |
2
|
0
|
| Other comprehensive loss (unrealized) |
$ 0
|
$ 0
|
| Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Liability, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
|
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
|
| Fair value measurement, Liabilities, Ending balance |
$ 0
|
$ 0
|
| Embedded Credit Derivative [Member] | Sales [Member] |
|
|
| Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |
|
|
| Fair value measurement, Liabilities |
$ 0
|
$ 0
|
| Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |
Revenue from Contract with Customer, Excluding Assessed Tax
|
Revenue from Contract with Customer, Excluding Assessed Tax
|
| Embedded Credit Derivative [Member] | Other Income, Net [Member] |
|
|
| Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |
|
|
| Fair value measurement, Liabilities |
$ (2)
|
$ 0
|
| Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |
Nonoperating Income (Expense)
|
Nonoperating Income (Expense)
|