Assumptions to Determine Benefit Obligation and Net Periodic Benefit Cost (Detail) - Pension Plans, Defined Benefit		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on assets		2.25%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on assets		2.50%
U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Benefit Obligation discount rate		4.35%	3.55%
Benefit Obligation rate of increases in compensation level		2.65%	2.65%
Net periodic benefit cost discount rate		3.55%	4.15%	4.50%
Net periodic benefit cost rate of increases in compensation level		2.65%	2.65%	2.65%
Expected long-term rate of return on assets		7.08%	7.08%	7.08%
Non-U.S. Pension Plans | Minimum
Defined Benefit Plan Disclosure [Line Items]
Benefit Obligation discount rate	[1]	0.50%	0.25%
Benefit Obligation rate of increases in compensation level	[1]	2.00%	2.00%
Net periodic benefit cost discount rate	[1]	0.25%	0.50%	0.50%
Net periodic benefit cost rate of increases in compensation level	[1]	2.00%	2.00%	2.25%
Expected long-term rate of return on assets	[1]	2.25%	1.50%	1.50%
Non-U.S. Pension Plans | Maximum
Defined Benefit Plan Disclosure [Line Items]
Benefit Obligation discount rate	[1]	3.25%	3.25%
Benefit Obligation rate of increases in compensation level	[1]	5.00%	5.00%
Net periodic benefit cost discount rate	[1]	3.25%	3.25%	3.60%
Net periodic benefit cost rate of increases in compensation level	[1]	5.00%	5.00%	5.00%
Expected long-term rate of return on assets	[1]	2.50%	2.50%	3.60%

[1] The Non-U.S. weighted average plan ranges in the tables above have been prepared using significant plans only, which in total represent around 86% of the total Non-U.S. projected benefit obligation.