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, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.80%	3.70%
Rate of compensation increase	2.50%	2.70%
Discount rate	3.70%	4.70%
Rate of compensation increase	2.70%	2.80%
Expected return on plan assets	5.90%	6.00%

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, 2015

Dec. 31, 2014

Defined Benefit Plan Disclosure [Line Items]

Discount rate

3.80%

3.70%

Rate of compensation increase

2.50%

2.70%

Discount rate

3.70%

4.70%

Rate of compensation increase

2.70%

2.80%

Expected return on plan assets

5.90%

6.00%