Accumulated Other Comprehensive Income (Loss) - Schedule of Income Tax Provision (Benefit) Allocated to Components of OCI (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity [Abstract]
Foreign currency translation adjustments	$ (28)	$ 0	$ 4
Unrecognized pension and postretirement costs	23	0	11
Derivative financial instruments	(1)	(3)	19
Income tax provision (benefit) related to AOCL	$ (6)	$ (3)	$ 34