Goodwill and Other Intangible Assets - Other Intangible Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized intangibles, Gross Amounts	$ 5,610	$ 5,304
Amortized intangibles, Accumulated Amortization	$ (2,795)	(2,453)
Trade names and trademarks
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite Lived Intangible Asset, Weighted Average Useful Life	13 years
Amortized intangibles, Gross Amounts	$ 140	167
Amortized intangibles, Accumulated Amortization	$ (88)	(84)
Trade names and trademarks | Minimum
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Trade names and trademarks | Maximum
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years
Customer - related intangibles
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite Lived Intangible Asset, Weighted Average Useful Life	21 years
Amortized intangibles, Gross Amounts	$ 3,035	3,013
Amortized intangibles, Accumulated Amortization	$ (1,312)	(1,193)
Customer - related intangibles | Minimum
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	6 years
Customer - related intangibles | Maximum
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	25 years
Covenants-not-to-compete
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite Lived Intangible Asset, Weighted Average Useful Life	3 years
Amortized intangibles, Gross Amounts	$ 39	37
Amortized intangibles, Accumulated Amortization	$ (36)	(35)
Covenants-not-to-compete | Minimum
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Covenants-not-to-compete | Maximum
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years
Computer software
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite Lived Intangible Asset, Weighted Average Useful Life	5 years
Amortized intangibles, Gross Amounts	$ 2,223	1,919
Amortized intangibles, Accumulated Amortization	$ (1,258)	(1,055)
Computer software | Minimum
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years
Computer software | Maximum
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Patents and other
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite Lived Intangible Asset, Weighted Average Useful Life	6 years
Amortized intangibles, Gross Amounts	$ 173	168
Amortized intangibles, Accumulated Amortization	$ (101)	(86)
Patents and other | Minimum
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years
Patents and other | Maximum
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Trade names and trademarks
Finite And Indefinite Lived Intangible Assets [Line Items]
Indefinite-lived intangibles, Gross Amounts	$ 1,921	$ 1,921