Pension - Major Assumptions Used to Determine Benefit Obligation (Detail)	3 Months Ended
	Mar. 31, 2022
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Benefit obligation, discount rate, PBO	1.90%
Benefit obligation, salary scale	2.90%
Net periodic benefit cost, discount rate, PBO	1.90%
Net periodic benefit cost, discount rate, interest cost	1.70%
Net periodic benefit cost, discount rate, service cost	2.20%
Net periodic benefit cost, salary scale	2.90%
Net periodic benefit cost, expected return on plan assets	3.10%