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, 2023	Dec. 31, 2022	Dec. 31, 2021
Amounts Recognized in Balance Sheet:
Postretirement Benefits	$ (175)	$ (165)
Other Assets	629	904
US
Change in Projected Benefit Obligations:
Projected benefit obligation at beginning of year	3,315	4,668
Service cost	23	37	$ 44
Interest cost	178	137	127
Actuarial losses (gains)	117	(1,152)
Benefits paid	(220)	(375)
Projected benefit obligation at end of year	3,413	3,315	4,668
Change in Plan Assets:
Plan assets at fair value at beginning of year	3,396	4,696
Actual return on plan assets	242	(933)
Company contributions	9	8
Benefits paid	(220)	(375)
Plan assets at fair value at end of year	3,427	3,396	4,696
Asset	14	81
Amounts Recognized in Balance Sheet:
Postretirement Benefits	(159)	(151)
Other Assets	173	232
Total of post retirement benefits	14	81
Amounts Recognized in Accumulated Other Comprehensive Loss:
Actuarial losses	328	255
Accumulated benefit obligation	3,313	3,221
International
Change in Projected Benefit Obligations:
Projected benefit obligation at beginning of year	7,598	10,618
Service cost	54	101	117
Interest cost	407	298	267
Contribution by plan participants	52	47
Actuarial losses (gains)	302	(3,140)
Currency effect	56	(148)
Benefits paid	(360)	(363)
Other		185
Projected benefit obligation at end of year	8,109	7,598	10,618
Change in Plan Assets:
Plan assets at fair value at beginning of year	8,126	11,221
Actual return on plan assets	494	(2,834)
Currency effect	71	(188)
Company contributions	7	18
Contributions by plan participants	52	47
Benefits paid	(360)	(363)
Other		225
Plan assets at fair value at end of year	8,390	8,126	$ 11,221
Asset	281	528
Amounts Recognized in Balance Sheet:
Postretirement Benefits	(16)	(14)
Other Assets	297	542
Total of post retirement benefits	281	528
Amounts Recognized in Accumulated Other Comprehensive Loss:
Actuarial losses	1,804	1,366
Accumulated benefit obligation	$ 7,942	$ 7,454