Employee Benefit Plans (Changes in Projected Benefit Obligations, Plan Assets and Funded Status) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 1,720
End balance	1,580	$ 1,720
Amounts recognized in the Consolidated Balance Sheet:
Accounts payable and accrued liabilities	(76)	(96)
Other postretirement benefits	(410)	(450)
Accrued pensions	(558)	(588)
Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	2,211	2,381
Service cost	8	7	$ 9
Interest cost	103	111	73
Plan amendments	1	0
Actuarial (gains)/losses	(90)	119
Benefits paid	(120)	(129)
Foreign currency translation adjustments	(54)	47
Settlements	(32)	(320)
Other	0	(5)
Projected benefit obligation, End of year	2,027	2,211	2,381
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	1,720	1,965
Actual return on plan assets	(8)	88
Company contributions	26	46
Benefits paid	(93)	(101)
Plan settlements	(25)	(320)
Foreign currency translation adjustments	(37)	45
Other	(3)	(3)
End balance	1,580	1,720	1,965
Funded Status	(447)	(491)
Amounts recognized in the Consolidated Balance Sheet:
Other assets (long-term)	144	148
Accounts payable and accrued liabilities	(33)	(51)
Accrued pensions	(558)	(588)
Net liability recognized	(447)	(491)
Other Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	495	524
Service cost	3	4	8
Interest cost	23	27	16
Plan amendments	0	(17)
Actuarial (gains)/losses	(24)	0
Benefits paid	(39)	(42)
Foreign currency translation adjustments	(5)	1
Curtailments	0	(2)
Projected benefit obligation, End of year	453	495	524
Amounts recognized in the Consolidated Balance Sheet:
Accounts payable and accrued liabilities	(43)	(45)
Other postretirement benefits	(410)	(450)
Net liability recognized	(453)	(495)
United States
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Company contributions	24	28	0
United States | Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	1,143	1,425
Service cost	0	0
Interest cost	55	62
Plan amendments	0	0
Actuarial (gains)/losses	(57)	44
Benefits paid	(67)	(79)
Foreign currency translation adjustments	0	0
Settlements	(19)	(309)
Other	0	0
Projected benefit obligation, End of year	1,055	1,143	1,425
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	731	1,028
Actual return on plan assets	7	45
Company contributions	24	28
Benefits paid	(49)	(61)
Plan settlements	(19)	(309)
Foreign currency translation adjustments	0	0
Other	0	0
End balance	694	731	1,028
Funded Status	(361)	(412)
Amounts recognized in the Consolidated Balance Sheet:
Other assets (long-term)	0	0
Accounts payable and accrued liabilities	(18)	(38)
Accrued pensions	(343)	(374)
Net liability recognized	(361)	(412)
United States | Other Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	424	458
Service cost	3	4
Interest cost	20	23
Plan amendments	0	(17)
Actuarial (gains)/losses	(22)	(3)
Benefits paid	(35)	(39)
Foreign currency translation adjustments	0	0
Curtailments	0	(2)
Projected benefit obligation, End of year	390	424	458
Amounts recognized in the Consolidated Balance Sheet:
Accounts payable and accrued liabilities	(39)	(41)
Other postretirement benefits	(351)	(383)
Net liability recognized	(390)	(424)
International
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Company contributions	2	18	11
International | Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	1,068	956
Service cost	8	7
Interest cost	48	49
Plan amendments	1	0
Actuarial (gains)/losses	(33)	75
Benefits paid	(53)	(50)
Foreign currency translation adjustments	(54)	47
Settlements	(13)	(11)
Other	0	(5)
Projected benefit obligation, End of year	972	1,068	956
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	989	937
Actual return on plan assets	(15)	43
Company contributions	2	18
Benefits paid	(44)	(40)
Plan settlements	(6)	(11)
Foreign currency translation adjustments	(37)	45
Other	(3)	(3)
End balance	886	989	937
Funded Status	(86)	(79)
Amounts recognized in the Consolidated Balance Sheet:
Other assets (long-term)	144	148
Accounts payable and accrued liabilities	(15)	(13)
Accrued pensions	(215)	(214)
Net liability recognized	(86)	(79)
International | Other Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	71	66
Service cost	0	0
Interest cost	3	4
Plan amendments	0	0
Actuarial (gains)/losses	(2)	3
Benefits paid	(4)	(3)
Foreign currency translation adjustments	(5)	1
Curtailments	0	0
Projected benefit obligation, End of year	63	71	$ 66
Amounts recognized in the Consolidated Balance Sheet:
Accounts payable and accrued liabilities	(4)	(4)
Other postretirement benefits	(59)	(67)
Net liability recognized	$ (63)	$ (71)