Pensions and Postretirement Benefits Other than Pensions - Weighted Average Assumptions Used to Determine Benefit Obligations (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Pension Benefits - All plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.54%	4.10%
Pension Benefits - Domestic
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.90%	4.20%
International
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.65%	3.84%
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.95%	4.20%
Other Postretirement Benefits - Domestic Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.95%	4.20%
Other Postretirement Benefits - Foreign
Defined Benefit Plan Disclosure [Line Items]
Discount rate	0.00%	0.00%