Employee Benefit Plans (Additional Information) (Detail) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2017	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension and Other Postretirement Benefits Disclosure [Line Items]
Pension settlement charge			$ 0	$ 190	$ 0
Reduction in projected benefit obligation due to non-cash settlement charge			309
ABO for all defined benefit pension plans			$ 2,000	$ 2,200
Return on plan assets assumption			6.60%	6.50%	5.00%
Impact on net periodic pension expense			$ 5
Weighted-average healthcare cost trend rate assumed for next fiscal year			5.50%
Assumed ultimate health care cost trend rate			3.90%
Aggregate PBO for the pension plans with PBO in excess of plan assets			$ 1,307	$ 1,426
Aggregate fair value of plan assets for the pension plans with PBO in excess of plan assets			717	771
Aggregate ABO for the pension plans with ABO in excess of plan assets			1,274	1,366
Fair value of plan assets for the pension plans with ABO in excess of plan assets			$ 712	737
Defined Contribution Plan Contribution Rates As Percentage Of Employees Earnings			6.00%
Minimum
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined Contribution Plan Contribution Rates As Percentage Of Employees Earnings			2.00%
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year			$ 20
Maximum
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined Contribution Plan Contribution Rates As Percentage Of Employees Earnings			5.00%
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year			$ 30
Scenario, Forecast
Pension and Other Postretirement Benefits Disclosure [Line Items]
Impact on net periodic pension expense		$ 3
Weighted-average healthcare cost trend rate assumed for next fiscal year		6.60%
Assumed ultimate health care cost trend rate		3.90%
Pension Plan
Pension and Other Postretirement Benefits Disclosure [Line Items]
Plan amendments			1	0
Contributions to defined benefit pension plans			26	46
Defined Benefit Plan, Benefit Obligation, Benefits Paid			120	129
Net actuarial loss/(gain) arising during the year			28
Estimated future benefit payments in 2022			139
Estimated future benefit payments in 2023			139
Estimated future benefit payments in 2024			143
Estimated future benefit payments in 2025			143
Estimated future benefit payments in 2026			146
Estimated aggregate future benefits payments for the five years thereafter			778
Other Postretirement Benefits
Pension and Other Postretirement Benefits Disclosure [Line Items]
Plan amendments			0	(17)
Defined Benefit Plan, Benefit Obligation, Benefits Paid			39	42
Net actuarial loss/(gain) arising during the year			(24)
Estimated future benefit payments in 2022			43
Estimated future benefit payments in 2023			41
Estimated future benefit payments in 2024			39
Estimated future benefit payments in 2025			38
Estimated future benefit payments in 2026			37
Estimated aggregate future benefits payments for the five years thereafter			$ 172
Other Postretirement Benefits | Scenario, Forecast
Pension and Other Postretirement Benefits Disclosure [Line Items]
Impact on net periodic pension expense		$ 1
Postretirement Health Coverage
Pension and Other Postretirement Benefits Disclosure [Line Items]
Plan amendments	$ 306
Amortization reduction period	5 years 7 months 6 days
Welfare Benefits - U.S.
Pension and Other Postretirement Benefits Disclosure [Line Items]
Percentage of defined benefit pension plan assets market value			86.00%
United States
Pension and Other Postretirement Benefits Disclosure [Line Items]
Contributions to defined benefit pension plans			$ 24	28	$ 0
Return on plan assets assumption			7.70%
Percentage of defined benefit pension plan assets market value			92.00%
United States | Scenario, Forecast
Pension and Other Postretirement Benefits Disclosure [Line Items]
Return on plan assets assumption		7.70%
United States | Pension Plan
Pension and Other Postretirement Benefits Disclosure [Line Items]
Plan amendments			$ 0	0
Contributions to defined benefit pension plans			24	28
Defined Benefit Plan, Benefit Obligation, Benefits Paid			67	79
United States | Other Postretirement Benefits
Pension and Other Postretirement Benefits Disclosure [Line Items]
Plan amendments			0	(17)
Defined Benefit Plan, Benefit Obligation, Benefits Paid			35	39
International
Pension and Other Postretirement Benefits Disclosure [Line Items]
Contributions to defined benefit pension plans			2	18	$ 11
International | Scenario, Forecast
Pension and Other Postretirement Benefits Disclosure [Line Items]
Return on plan assets assumption		6.70%
International | Pension Plan
Pension and Other Postretirement Benefits Disclosure [Line Items]
Plan amendments			1	0
Contributions to defined benefit pension plans			2	18
Defined Benefit Plan, Benefit Obligation, Benefits Paid			53	50
International | Other Postretirement Benefits
Pension and Other Postretirement Benefits Disclosure [Line Items]
Plan amendments			0	0
Defined Benefit Plan, Benefit Obligation, Benefits Paid			$ 4	$ 3
Canada, Netherlands, And United Kingdom
Pension and Other Postretirement Benefits Disclosure [Line Items]
Percentage of defined benefit pension plan assets market value			92.00%