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Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2025
Retirement Benefits [Abstract] |
Schedule of Net Periodic (Benefit) Cost Components | The following tables present the components of net periodic (benefit) cost for the defined benefit plans:
| Pension Benefits |  |
| Three Months Ended |  |  |  | Nine Months Ended |  |
| September 30, |  |  |  | September 30, |  |
| 2025 |  | 2024 |  |  |  | 2025 |  | 2024 |  |
(In millions) |  |  |  |  |  |  |  |  |  |  |
Service cost |  |  | $ | 1 |  |  |  |  | $ | 1 |  |  | $ | 2 |  |  |
Interest cost | $ | 12 |  |  | 23 |  |  |  |  | 34 |  |  | 72 |  |  |
Expected return on plan assets | (16) |  |  | (29) |  |  |  |  | (46) |  |  | (88) |  |  |
Amortization of unrecognized net loss | 2 |  |  | 7 |  |  |  |  | 6 |  |  | 22 |  |  |
Settlements |  |  | 4 |  |  |  |  | 1 |  |  | 4 |  |  |
Net periodic (benefit) cost | $ | (2) |  |  | $ | 6 |  |  |  |  | $ | (4) |  |  | $ | 12 |  |  |
| Other Postretirement Benefits
| Three Months Ended |  |  |  | Nine Months Ended
| September 30, |  |  |  | September 30,
| 2025 |  | 2024 |  |  |  | 2025 |  | 2024
(In millions) |  |  |  |  |  |  |  |  |
Interest cost |  |  |  |  |  |  | $ | 1 |  |  | $ | 1 |
Expected return on plan assets | $ | (1) |  |  | $ | (1) |  |  |  |  | (2) |  |  | (2) |
Amortization of unrecognized net loss |  |  | 1 |  |  |  |  |  |  | 1 |
Net periodic benefit | $ | (1) |  |  | $ | — |  |  |  |  | $ | (1) |  |  | $ | — |

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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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