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, 2016	Dec. 31, 2015
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	$ 272	$ 416
Accumulated benefit obligation	272	416
Fair value of plan assets	192	302
Foreign
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	266	337
Accumulated benefit obligation	261	332
Fair value of plan assets	$ 188	$ 262