Employee Benefit Plans (Change in Fair Value of Company's Level 3 Pension Assets) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 2,975
End balance	1,974	$ 2,975
Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	954	916
Realized gains/(losses)	(99)	1
Unrealized gains	3	30
Transfers in/(out), net	(122)	38
Foreign currency losses	(59)	(31)
End balance	677	954
Level 3 | Real Estate
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	157	124
Realized gains/(losses)	1	3
Unrealized gains	6	22
Transfers in/(out), net	(10)	8
Foreign currency losses	(5)	0
End balance	149	157
Level 3 | Other Debt Securities
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	367	421
Realized gains/(losses)	(99)	(11)
Unrealized gains	0	0
Transfers in/(out), net	(12)	(14)
Foreign currency losses	(21)	(29)
End balance	235	367
Level 3 | Hedge Funds and Other Assets
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	430	371
Realized gains/(losses)	(1)	9
Unrealized gains	(3)	8
Transfers in/(out), net	(100)	44
Foreign currency losses	(33)	(2)
End balance	$ 293	$ 430