Long-Term Employee Benefit Liabilities - Summary of Weighted Average Discount Rates Used in Measuring Company's Projected Retirement Medical Benefit Obligations and Net Periodic Benefit Cost (Detail) - Retirement Medical Benefits Plans [Member]	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Retirement medical benefit obligations	2.80%	2.40%
Net periodic benefit cost	2.40%	3.10%
Health care cost inflation	6.40%	6.60%

Long-Term Employee Benefit Liabilities - Summary of Weighted Average Discount Rates Used in Measuring Company's Projected Retirement Medical Benefit Obligations and Net Periodic Benefit Cost (Detail) - Retirement Medical Benefits Plans [Member]

12 Months Ended

Dec. 31, 2021

Dec. 31, 2020

Defined Benefit Plan Disclosure [Line Items]

Retirement medical benefit obligations

2.80%

2.40%

Net periodic benefit cost

2.40%

3.10%

Health care cost inflation

6.40%

6.60%