Retirement Plans, Postretirement and Postemployment Benefits - Schedule of Weighted-Average Assumptions (Detail)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.58%	5.88%
Rate of increase in future compensation levels	4.50%	4.50%
Discount rate	5.88%	3.44%	3.16%
Rate of increase in future compensation levels	4.50%	4.50%	4.50%
Expected long-term rate of return on assets	6.75%	6.75%	6.75%
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.79%	6.02%
Discount rate	6.02%	3.02%	2.48%