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v3.25.3

Pensions and Other Postretirement Benefits (Tables) | 9 Months Ended
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Sep. 30, 2025
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] |
Schedule of Pension and Postretirement Benefit Cost Components | Pension and postretirement benefit cost components were as follows:
| Pension Benefits |  | Other Postretirement Benefits
| Third Quarter
| 2025 |  | 2024 |  | 2025 |  | 2024
| ($ in millions)
Service cost | $ | 6 |  |  | $ | 7 |  |  | $ | 1 |  |  | $ | — |
Interest cost | 27 |  |  | 26 |  |  | 3 |  |  | 4 |
Expected return on plan assets | (49) |  |  | (51) |  |  | (2) |  |  | (2) |
Amortization of net losses (gains) | 6 |  |  | 4 |  |  | (1) |  |  | — |
Amortization of prior service benefit | — |  |  | — |  |  | (5) |  |  | (6) |
Net benefit | $ | (10) |  |  | $ | (14) |  |  | $ | (4) |  |  | $ | (4) |
| Pension Benefits |  | Other Postretirement Benefits
| First Nine Months
| 2025 |  | 2024 |  | 2025 |  | 2024
| ($ in millions)
Service cost | $ | 18 |  |  | $ | 20 |  |  | $ | 2 |  |  | $ | 2 |
Interest cost | 80 |  |  | 80 |  |  | 10 |  |  | 11 |
Expected return on plan assets | (147) |  |  | (153) |  |  | (7) |  |  | (8) |
Amortization of net losses (gains) | 17 |  |  | 12 |  |  | (1) |  |  | — |
Amortization of prior service benefit | — |  |  | — |  |  | (16) |  |  | (18) |
Curtailment gain | — |  |  | — |  |  | — |  |  | (20) |
Net benefit | $ | (32) |  |  | $ | (41) |  |  | $ | (12) |  |  | $ | (33) |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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