Schedule of Weighted Average Assumptions to Determine Pension Obligations (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Discount rate	2.60%	2.20%	3.00%
Initial medical trend	7.30%	7.30%	7.10%
Ultimate health care trend	4.50%	4.50%	4.50%
Medical cost trend rate decrease to ultimate rate in year	2029	2029	2026
UNITED STATES
Defined Benefit Plan Disclosure
Discount rate	2.60%	2.20%
Salary progression rate	2.40%	2.40%
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure
Discount rate	1.10%	0.70%
Salary progression rate	2.20%	2.30%