Employee Benefits Plan - Summary of Weighted-Average Actuarial Assumptions (Detail) |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Funded Plans [Member] | ||
| Disclosure of sensitivity analysis for actuarial assumptions [line items] | ||
| Discount rate | 2.60% | 2.22% |
| Inflation assumption | 2.93% | 2.78% |
| Rate of increase in salaries | 3.48% | 3.48% |
| Rate of increase in pension payments | 3.13% | 2.79% |
| Medical cost trend | 0.00% | 0.00% |
| Unfunded Plans [Member] | ||
| Disclosure of sensitivity analysis for actuarial assumptions [line items] | ||
| Discount rate | 2.92% | 2.59% |
| Inflation assumption | 2.72% | 2.71% |
| Rate of increase in salaries | 1.64% | 1.75% |
| Rate of increase in pension payments | 2.77% | 2.75% |
| Medical cost trend | 0.00% | 0.00% |
| Other Post Employment Benefits [Member] | ||
| Disclosure of sensitivity analysis for actuarial assumptions [line items] | ||
| Discount rate | 2.55% | 2.05% |
| Inflation assumption | 0.00% | 0.00% |
| Rate of increase in salaries | 3.50% | 3.50% |
| Rate of increase in pension payments | 0.00% | 0.00% |
| Medical cost trend | 7.10% | 7.50% |