Asset Impairments - Identified Intangible Assets, by Major Classification (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Intangible Assets Net Excluding Goodwill [Line Items]
Gross	$ 1,055	$ 1,472
Accumulated Amortization	(528)	(620)
Net Book Value	527	852	$ 3,020
Indefinite-lived Trade Names [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Gross	196	280
Net Book Value	196	280
Customer Relationships [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Gross	475	598
Accumulated Amortization	(300)	(305)
Net Book Value	175	293
Trademarks [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Gross	175	190
Accumulated Amortization	(116)	(123)
Net Book Value	59	67
Patents [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Gross	115	121
Accumulated Amortization	(53)	(47)
Net Book Value	62	74
Other [Member]
Intangible Assets Net Excluding Goodwill [Line Items]
Gross	94	283
Accumulated Amortization	(59)	(145)
Net Book Value	$ 35	$ 138