Goodwill and Other Intangible Assets - Other Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,852	$ 1,762
Accumulated amortization	(897)	(806)
Indefinite-lived trade names and trademarks	32	32
Total other intangible assets	1,884	1,794
Computer software
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	789	755
Accumulated amortization	(674)	(623)
Patents and licenses
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	110	110
Accumulated amortization	(107)	(102)
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	953	897
Accumulated amortization	$ (116)	$ (81)