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Pension And Other Retirement Benefits - Components of Net Periodic Benefit Expense Related to Retirement Plans (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]      
Interest cost $ 26 $ 26 $ 17
U.S. Plans | Pension Plans      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 10 11 14
Interest cost 22 22 15
Expected return on plan assets (30) (32) (26)
Amortization of net actuarial (gains) losses and prior service credits from earlier periods 0 (1) 3
Loss on settlement of pension obligation (1) (2) 0
Net periodic expense (income) 1 (2) 6
U.S. Plans | Other Retirement Plans      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 3 3 4
Interest cost 2 2 1
Expected return on plan assets 0 0 0
Amortization of net actuarial (gains) losses and prior service credits from earlier periods (1) (1) 0
Loss on settlement of pension obligation 0 0 0
Net periodic expense (income) $ 4 $ 4 $ 5