Details of Finite-Lived Intangible Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Gross	$ 530	$ 530
Accumulated Amortization	(283)	(271)
Net	247	259
Customer lists
Finite Lived Intangible Assets [Line Items]
Gross	240	240
Accumulated Amortization	(25)	(19)
Net	215	221
Contract manufacturing agreement
Finite Lived Intangible Assets [Line Items]
Gross	151	151
Accumulated Amortization	(145)	(143)
Net	6	8
Trademarks
Finite Lived Intangible Assets [Line Items]
Gross	124	124
Accumulated Amortization	(110)	(107)
Net	14	17
Other intangibles
Finite Lived Intangible Assets [Line Items]
Gross	15	15
Accumulated Amortization	(3)	(2)
Net	$ 12	$ 13