Pension Plans, Postretirement and Other Employee Benefits - Weighted-Average Assumptions used to Determine Net Periodic Benefit Cost (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate	4.30%	4.10%	4.80%
United States Pension Plans of US Entity, Defined Benefits
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate	4.30%	4.10%	4.80%
Expected long-term return on plan assets	7.60%	7.80%	7.80%
Foreign
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate	3.50%	3.20%	4.30%
Expected long-term return on plan assets	5.70%	5.90%	6.10%
Rate of compensation increase	2.70%	3.00%	3.30%