Employee Benefit Plans (Change in Accumulated Other Comprehensive Loss (Pretax) Relating to Defined Benefit Pension and Other Postretirement Benefits) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss/(gain) arising during the year	$ (24)
Plan amendment	0
Amortization of actuarial (loss)/gain	(1)	$ (1)	$ 12
Amortization of prior service credit	4	7	11
Foreign currency translation adjustments	1
Impact of settlements	0
Net decrease	(18)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss/(gain) arising during the year	28
Plan amendment	(1)
Amortization of actuarial (loss)/gain	22	$ 21	$ 34
Amortization of prior service credit	(1)
Foreign currency translation adjustments	(7)
Impact of settlements	(11)
Net decrease	$ (12)