v2.4.0.6
Aggregated Estimated Fair Value of Assets Acquired (Detail) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Goodwill and Intangible Assets Disclosure [Line Items]  
Goodwill $ 18
Deferred tax liabilities (3)
Total 24
Acquired Technology
 
Goodwill and Intangible Assets Disclosure [Line Items]  
Intangible assets acquired 6
Non-compete agreements
 
Goodwill and Intangible Assets Disclosure [Line Items]  
Intangible assets acquired $ 3