Pension and Other Benefit Plans - Changes in Projected Benefit Obligation, Plan Assets and Funded Status of Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Amounts Recognized in Balance Sheet:
Postretirement Benefits	$ (512)	$ (175)
Other Assets	472	629
US
Change in Projected Benefit Obligations:
Projected benefit obligation at beginning of year	3,413	3,315
Service cost	23	23	$ 37
Interest cost	173	178	137
Actuarial losses (gains)	(160)	117
Benefits paid	(224)	(220)
Projected benefit obligation at end of year	3,225	3,413	3,315
Change in Plan Assets:
Plan assets at fair value at beginning of year	3,427	3,396
Actual return on plan assets	(38)	242
Company contributions	10	9
Benefits paid	(224)	(220)
Plan assets at fair value at end of year	3,175	3,427	3,396
Asset / (Unfunded Liability)	(50)	14
Amounts Recognized in Balance Sheet:
Postretirement Benefits	(154)	(159)
Other Assets	104	173
Total of post retirement benefits	(50)	14
Amounts Recognized in Accumulated Other Comprehensive Loss:
Actuarial losses	405	328
Accumulated benefit obligation	3,137	3,313
International
Change in Projected Benefit Obligations:
Projected benefit obligation at beginning of year	8,109	7,598
Service cost	56	54	101
Interest cost	413	407	298
Contribution by plan participants	61	52
Actuarial losses (gains)	(457)	302
Currency effect	(2)	56
Benefits paid	(384)	(360)
Projected benefit obligation at end of year	7,796	8,109	7,598
Change in Plan Assets:
Plan assets at fair value at beginning of year	8,390	8,126
Actual return on plan assets	(408)	494
Currency effect	(2)	71
Company contributions	17	7
Contributions by plan participants	61	52
Benefits paid	(384)	(360)
Plan assets at fair value at end of year	7,674	8,390	$ 8,126
Asset / (Unfunded Liability)	(122)	281
Amounts Recognized in Balance Sheet:
Postretirement Benefits	(358)	(16)
Other Assets	236	297
Total of post retirement benefits	(122)	281
Amounts Recognized in Accumulated Other Comprehensive Loss:
Actuarial losses	2,296	1,804
Accumulated benefit obligation	$ 7,634	$ 7,942