Benefit Plans - Schedule of Assumptions (Detail)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension plans
Benefit obligation assumptions
Discount rate	4.26%	4.77%	2.21%
Rate of compensation increase	3.70%	3.80%	3.61%
Net periodic benefit expense assumptions
Discount rate	4.77%	2.21%	1.74%
Expected long-term return on plan assets	4.76%	2.89%	2.60%
Rate of compensation increase	3.80%	3.61%	3.62%
Other post-retirement plans
Benefit obligation assumptions
Discount rate	4.84%	5.11%	2.34%
Net periodic benefit expense assumptions
Discount rate	5.11%	2.34%	1.77%