Pension and Other Postretirement Benefits - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2025
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) to other noncurrent assets			$ 91,000,000	$ 4,000,000
Action #1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlement gain	$ 1,000,000		(1,000,000)
Settlement gain after tax	0
Increase (decrease) to other noncurrent assets	(2,000,000)		(2,000,000)
Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum required cash contribution to pension plans	$ 2,000,000	$ 4,000,000	$ 16,000,000	$ 14,000,000
Forecast [Member] | United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum required cash contribution to pension plans					$ 20,000,000