Pension and Other Benefit Plans - Weighted-Average Assumed Discount Rate and Compensation Increases Used to Determine Projected Benefit Obligations for US and International Plans (Detail)	Dec. 31, 2015	Dec. 31, 2014
US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	4.50%	4.15%
Compensation increases	4.00%	4.00%
International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	4.36%	4.07%
Compensation increases	4.80%	4.79%