Pensions - Weighted Average Assumptions Used to Determine Net Periodic Benefit Costs (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
U.S. [Member]
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	4.24%	3.94%	4.68%
Expected return on plan assets	6.60%	6.70%	7.15%
Non-U.S. [Member]
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	2.80%	2.66%	3.72%
Expected return on plan assets	4.39%	4.80%	5.63%
Rate of compensation increase	3.15%	3.11%	3.69%