Postretirement Benefits Other Than Pensions - Schedule of 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. Other Postretirement Benefits [Member]
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	4.20%	3.85%	4.60%
Non-U.S. Other Postretirement Benefits [Member]
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	4.00%	3.90%	4.70%