Pension and Other Employee Benefits - Economic Assumptions Used in Computation of Respective Net Periodic Benefit Cost (Detail) - Pension Benefits [Member]	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
US Plan [Member]
Economic Assumptions Used In Measuring Of Fair Value Securitized Loans [Line Items]
Discount rate		3.80%
Expected return on plan assets		3.80%
Non-U.S. Plans [Member]
Economic Assumptions Used In Measuring Of Fair Value Securitized Loans [Line Items]
Discount rate	2.50%	2.50%
Expected return on plan assets	2.50%	2.50%