Summary of Accounting Policies - Plant Property, and Equipment (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Plant, property, and equipment, at cost	$ 3,418	$ 3,490
Land, buildings, and improvements
Property, Plant and Equipment [Line Items]
Plant, property, and equipment, at cost	561	569
Machinery and equipment
Property, Plant and Equipment [Line Items]
Plant, property, and equipment, at cost	2,569	2,655
Other, including construction in progress
Property, Plant and Equipment [Line Items]
Plant, property, and equipment, at cost	$ 288	$ 266