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Employee Benefits - Obligations (Details) - Pension Plan - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Change in Benefit Obligation: |  |  |
Benefit obligation at beginning of year | $ 115 | $ 116 |
Interest cost | 5 | 5 | $ 4
Actuarial gain | (6) | 2 |
Annuity payments | (7) | (7) |
Settlements | (1) | (1) |
Benefit obligation at end of year | 106 | 115 | 116
Change in Plan Assets: |  |  |
Fair value of assets at beginning of year | 253 | 228 |
Actual return (loss) on plan assets | 0 | 33 |
Annuity payments | (6) | (7) |
Settlements | (1) | (1) |
Fair value of assets at end of year | 246 | 253 | $ 228
Funded status (included in other assets) | 140 | 138 |
Changes recognized in other comprehensive income for the year ended December 31: |  |  |
Amortization of actuarial gain (loss) | (3) | (7) |
Net actuarial (gain) loss arising during the year | 10 | (18) |
Total recognized in other comprehensive income for the year (pre-tax) | 7 | (25) |
Accumulated other comprehensive loss (pre-tax) not yet recognized in net periodic benefit cost at December 31: |  |  |
Actuarial loss, net | 49 | 41 |
Total accumulated other comprehensive loss (pre-tax) | $ 49 | $ 41 |

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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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