Pension and Other Postretirement Benefits - Discount Rates and Weighted-Average Wage Increases Used to Determine the Benefit Obligations (Detail)	Dec. 31, 2016	Dec. 31, 2015
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate		4.40%
Wage increases	3.00%	3.00%
U.S. Pension Benefits [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.02%
U.S. Pension Benefits [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.25%
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate		3.65%
Foreign Pension Benefits [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.50%
Foreign Pension Benefits [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.65%
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate		4.20%
Other Postretirement Benefits [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.90%
Other Postretirement Benefits [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.13%