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Retirement Employee Benefits - Schedule of Main Actuarial Assumptions at Reporting Date (Detail)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Defined Benefit Plans [Abstract]      
Discount of the projected benefit obligation at present value 8.00% 7.10% 7.40%
Salary increase 6.00% 6.80% 6.80%
Remaining labor life 16 years 1 month 6 days 17 years 8 months 12 days 17 years 7 months 6 days
Inflation 7.10% 6.75% 6.00%