Pension Plans, Postretirement and Other Employee Benefits - Projected Benefit Obligation Accumulated Benefit Obligation and Fair Value of Plan Assets for All Pension Plans (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
United States Pension Plans of US Entity, Defined Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	$ 416	$ 448
Accumulated benefit obligation	416	448
Fair value of plan assets	302	334
Foreign
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	337	349
Accumulated benefit obligation	332	344
Fair value of plan assets	$ 262	$ 253