- Finite-Lived Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Amortization Expenses	$ 4	$ 5	$ 5
Gross Carrying Value	48	48
Accumulated Amortization	(23)	(19)
Customer Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	8	8
Accumulated Amortization	(4)	(4)
Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	3	3
Accumulated Amortization	(2)	(2)
Technology Rights
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	26	26
Accumulated Amortization	(15)	(12)
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	11	11
Accumulated Amortization	$ (2)	$ (1)