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Comprehensive Income (Tables) | 9 Months Ended
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Sep. 30, 2025
Comprehensive Income [Abstract] |
Accumulated Other Comprehensive Income, Net Of Tax |
|  | OPEB |  |
($ in millions) |  | Costs |  |
Balance at January 1, 2025 (1) |  | $ | 77 |  |
Other comprehensive income before reclassifications |  |  | - |  |
Amounts reclassified from accumulated other |  |  |  |  |
comprehensive loss to net loss |  |  | (14) |  |
Net current-period other comprehensive loss |  |  | (14) |  |
Balance at September 30, 2025 (1) |  | $ | 63 |  |
|  | OPEB |  |
($ in millions) |  | Costs |  |
Balance at January 1, 2024 (1) |  | $ | 96 |  |
Other comprehensive income before reclassifications |  |  | 1 |  |
Amounts reclassified from accumulated other |  |  |  |  |
comprehensive loss to net income |  |  | (15) |  |
Net current-period other comprehensive income |  |  | (14) |  |
Balance at September 30, 2024 (1) |  | $ | 82 |  |
(1)OPEB amounts are net of deferred tax balances of $23 million and $29 million as of January 1, 2025 and 2024, respectively, and $18 million and $24 million as of September 30, 2025 and 2024, respectively.
Reclassification Out Of AOCI |
|  |  | Amount Reclassified from |  |  |
|  |  | Accumulated Other |  |  |
|  |  | Comprehensive Income (1) |  |  |
($ in millions) |  |  |  |  |  |  |  |  |  |  |  |  |  | Affected Line Item in |
|  | For the three months ended |  | For the nine months ended |  | the Statement Where |
Details about Accumulated Other |  | September 30, |  | September 30, |  | Net Income (Loss) |
Comprehensive Loss Components |  | 2025 |  | 2024 |  | 2025 |  | 2024 |  | is Presented |
Amortization of OPEB Cost Items ‎Prior-service credits (costs) |  | $ | 7 |  | $ | 6 |  | $ | 19 |  | $ | 19 |  | Income (loss) before income taxes |
Tax impact |  |  | (2) |  |  | (1) |  |  | (5) |  |  | (4) |  | Income tax benefit |
|  | $ | 5 |  | $ | 5 |  | $ | 14 |  | $ | 15 |  | Net income |
(1)These accumulated other comprehensive income components are included in the computation of net periodic pension and OPEB costs (see Note 17 - Retirement Plans for additional details).

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