Employee Benefit Plans (Changes in Projected Benefit Obligations, Plan Assets and Funded Status) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 2,975
End balance	1,974	$ 2,975
Amounts recognized in the Consolidated Balance Sheet:
Accounts payable and accrued liabilities	(77)	(87)
Other postretirement benefits	(476)	(672)
Accrued pensions	(566)	(834)
Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	3,534	3,975
Service cost	9	9	$ 24
Interest cost	73	65	87
Actuarial gains	(934)	(163)
Benefits paid	(140)	(149)
Defined Benefit Plan, Benefit Obligation, Business Combination	0	48
Foreign currency translation adjustments	(126)	(51)
Settlements and curtailments	(22)	(198)
Other	(8)	(2)
Projected benefit obligation, End of year	2,386	3,534	3,975
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,975	3,216
Actual return on plan assets	(734)	108
Company contributions	11	10
Benefits paid	(114)	(123)
Defined Benefit Plan, Plan Assets, Business Combination	0	3
Plan settlements	(22)	(198)
Foreign currency translation adjustments	(140)	(38)
Other	(2)	(3)
End balance	1,974	2,975	3,216
Funded Status	(412)	(559)
Amounts recognized in the Consolidated Balance Sheet:
Other assets (long-term)	183	310
Accounts payable and accrued liabilities	(29)	(35)
Accrued pensions	(566)	(834)
Net (liability)/asset recognized	(412)	(559)
Other Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	724	786
Service cost	8	12	10
Interest cost	16	14	20
Actuarial gains	(174)	(43)
Benefits paid	(44)	(45)
Foreign currency translation adjustments	(6)	0
Projected benefit obligation, End of year	524	724	786
Amounts recognized in the Consolidated Balance Sheet:
Accounts payable and accrued liabilities	(48)	(52)
Other postretirement benefits	(476)	(672)
Net (liability)/asset recognized	(524)	(724)
United States | Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	1,920	2,042
Service cost	0	0
Interest cost	45	39
Actuarial gains	(449)	(72)
Benefits paid	(91)	(89)
Defined Benefit Plan, Benefit Obligation, Business Combination	0	0
Foreign currency translation adjustments	0	0
Settlements and curtailments	0	0
Other	0	0
Projected benefit obligation, End of year	1,425	1,920	2,042
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	1,329	1,335
Actual return on plan assets	(228)	66
Company contributions	0	0
Benefits paid	(73)	(72)
Defined Benefit Plan, Plan Assets, Business Combination	0	0
Plan settlements	0	0
Foreign currency translation adjustments	0	0
Other	0	0
End balance	1,028	1,329	1,335
Funded Status	(397)	(591)
Amounts recognized in the Consolidated Balance Sheet:
Other assets (long-term)	0	0
Accounts payable and accrued liabilities	(17)	(23)
Accrued pensions	(380)	(568)
Net (liability)/asset recognized	(397)	(591)
United States | Other Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	631	682
Service cost	8	11
Interest cost	13	12
Actuarial gains	(154)	(33)
Benefits paid	(40)	(41)
Foreign currency translation adjustments	0	0
Projected benefit obligation, End of year	458	631	682
Amounts recognized in the Consolidated Balance Sheet:
Accounts payable and accrued liabilities	(44)	(47)
Other postretirement benefits	(414)	(584)
Net (liability)/asset recognized	(458)	(631)
International
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Company contributions	11	10	17
International | Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	1,614	1,933
Service cost	9	9
Interest cost	28	26
Actuarial gains	(485)	(91)
Benefits paid	(49)	(60)
Defined Benefit Plan, Benefit Obligation, Business Combination	0	48
Foreign currency translation adjustments	(126)	(51)
Settlements and curtailments	(22)	(198)
Other	(8)	(2)
Projected benefit obligation, End of year	961	1,614	1,933
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	1,646	1,881
Actual return on plan assets	(506)	42
Company contributions	11	10
Benefits paid	(41)	(51)
Defined Benefit Plan, Plan Assets, Business Combination	0	3
Plan settlements	(22)	(198)
Foreign currency translation adjustments	(140)	(38)
Other	(2)	(3)
End balance	946	1,646	1,881
Funded Status	(15)	32
Amounts recognized in the Consolidated Balance Sheet:
Other assets (long-term)	183	310
Accounts payable and accrued liabilities	(12)	(12)
Accrued pensions	(186)	(266)
Net (liability)/asset recognized	(15)	32
International | Other Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	93	104
Service cost	0	1
Interest cost	3	2
Actuarial gains	(20)	(10)
Benefits paid	(4)	(4)
Foreign currency translation adjustments	(6)	0
Projected benefit obligation, End of year	66	93	$ 104
Amounts recognized in the Consolidated Balance Sheet:
Accounts payable and accrued liabilities	(4)	(5)
Other postretirement benefits	(62)	(88)
Net (liability)/asset recognized	$ (66)	$ (93)