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Pension And Other Retirement Benefits - Summary Of Pre Tax Amounts Recognized In Other Comprehensive Income (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net actuarial gain (loss) arising during the period | $ 25 | $ (8) | $ (1)
U.S. Plans | Pension Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Amortization of net actuarial (gains) losses and prior service credit | (1) | (1) | 3
(Gain) loss on settlement of pension obligations | (1) | (2) | 0
Net actuarial gain (loss) arising during the period | 22 | (3) | (19)
Total recognized in OCI – pre-tax | 20 | (6) | (16)
U.S. Plans | Other Retirement Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Amortization of net actuarial (gains) losses and prior service credit | (1) | (1) | 0
(Gain) loss on settlement of pension obligations | 0 | 0 | 0
Net actuarial gain (loss) arising during the period | 4 | 1 | 13
Total recognized in OCI – pre-tax | $ 3 | $ 0 | $ 13

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