Pensions and Other Post-retirement Benefits - Schedule of Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Assumptions used to determine benefit obligations, average discount rate	2.70%	2.28%
Assumptions used to determine benefit obligations, rate of compensation increase	4.58%	2.93%
Assumptions used to determine net periodic benefit cost, average discount rate, service cost	2.80%	3.08%
Assumptions used to determine net periodic benefit cost, average discount rate, interest cost	1.69%	2.52%
Assumptions used to determine net periodic benefit cost, expected return on plan assets	7.13%	7.10%
Assumptions used to determine net periodic benefit cost, rate of compensation increase	2.90%	2.93%
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Assumptions used to determine benefit obligations, average discount rate	2.66%	2.21%
Assumptions used to determine benefit obligations, rate of compensation increase	2.91%	3.00%
Assumptions used to determine net periodic benefit cost, average discount rate, service cost	2.42%	2.42%
Assumptions used to determine net periodic benefit cost, average discount rate, interest cost	1.48%	1.48%
Assumptions used to determine net periodic benefit cost, expected return on plan assets	0.00%	0.00%
Assumptions used to determine net periodic benefit cost, rate of compensation increase	3.00%	3.00%