Employee Benefit Plans (Change in Fair Value of Company's Level 3 Pension Assets) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 1,720
End balance	1,580	$ 1,720
Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	599	677
Realized gains/(losses)	13	0
Unrealized (losses)/gains	0	2
Transfers out, net	(21)	(115)
Foreign currency gains	(20)	35
End balance	571	599
Level 3 | Real Estate
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	119	149
Realized gains/(losses)	2	4
Unrealized (losses)/gains	(5)	(19)
Transfers out, net	(28)	(17)
Foreign currency gains	(1)	2
End balance	87	119
Level 3 | Other Debt Securities
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	258	235
Realized gains/(losses)	9	25
Unrealized (losses)/gains	0	0
Transfers out, net	(12)	(9)
Foreign currency gains	(16)	7
End balance	239	258
Level 3 | Hedge Funds and Other Assets
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	222	293
Realized gains/(losses)	2	(29)
Unrealized (losses)/gains	5	21
Transfers out, net	19	(89)
Foreign currency gains	(3)	26
End balance	$ 245	$ 222