Gross Carrying Value of Intangible Assets and Accumulated Amortization (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 350	$ 58
Accumulated Amortization	24	4
Net Carrying Value	326	54
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	245	42
Accumulated Amortization	17	2
Net Carrying Value	228	40
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	88	14
Accumulated Amortization	6	2
Net Carrying Value	82	12
Trade Name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	15
Accumulated Amortization	1
Net Carrying Value	14
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	2	2
Net Carrying Value	$ 2	$ 2