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, 2019	Dec. 31, 2018
U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	$ 1,320	$ 1,302
Accumulated benefit obligation	1,320	1,302
Fair value of plan assets	1,062	995
Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	682	620
Accumulated benefit obligation	637	606
Fair value of plan assets	126	111
Pension Plans | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	1,320	1,302
Fair value of plan assets	1,062	995
Pension Plans | Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	712	652
Fair value of plan assets	151	138
Other Postretirement Benefits Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	300	322
Fair value of plan assets	$ 0	$ 0