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, 2025	Dec. 31, 2024	Dec. 31, 2023
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss/(gain) arising during the year	$ (16)
Amortization of actuarial (loss)/gain	(1)	$ (1)	$ (1)
Amortization of prior service credit	5	4	7
Foreign currency translation adjustments	(1)
Impact of settlements	0
Net decrease	(11)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss/(gain) arising during the year	47
Amortization of actuarial (loss)/gain	23	22	$ 21
Amortization of prior service credit	0	$ (1)
Foreign currency translation adjustments	19
Impact of settlements	(6)
Net decrease	$ 37