Long-Term Employee Benefit Liabilities - Summary of Weighted Average Significant Actuarial Assumptions Adopted in Measuring Company's Obligations and Cost (Detail) - Pension Plan, Defined Benefit [Member]	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.50%	3.10%
Rate of compensation increase	2.60%	2.50%
Net periodic benefit cost Discount rate	3.20%	2.80%
Rate of compensation increase	2.60%	2.50%
Expected return on plan assets	4.90%	5.80%

Long-Term Employee Benefit Liabilities - Summary of Weighted Average Significant Actuarial Assumptions Adopted in Measuring Company's Obligations and Cost (Detail) - Pension Plan, Defined Benefit [Member]

12 Months Ended

Dec. 31, 2019

Dec. 31, 2018

Defined Benefit Plan Disclosure [Line Items]

Discount rate

2.50%

3.10%

Rate of compensation increase

2.60%

2.50%

Net periodic benefit cost Discount rate

3.20%

2.80%

Rate of compensation increase

2.60%

2.50%

Expected return on plan assets

4.90%

5.80%