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Business Combination, Intangible Assets Acquired (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Support Agreements and Related Relationships [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Existing Technology [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Core Technology [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Customer Contracts And Related Relationships [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Noncompete Agreements [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
OEM Customer Contracts [Member]
Dec. 31, 2011
Business Acquisitions 2011 [Member]
Dec. 31, 2011
Business Acquisitions 2011 [Member]
Existing or Core Technology [Member]
Y
Dec. 31, 2011
Business Acquisitions 2011 [Member]
Support Agreements and Related Relationships [Member]
Y
Dec. 31, 2011
Business Acquisitions 2011 [Member]
Patents [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
Support Agreements and Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
Existing Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
Core Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
Customer Contracts And Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
Noncompete Agreements [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
OEM Customer Contracts [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
Support Agreements and Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
Existing Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
Core Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
Customer Contracts And Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
Noncompete Agreements [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
OEM Customer Contracts [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
Support Agreements and Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
Existing Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
Core Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
Customer Contracts And Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
Noncompete Agreements [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
OEM Customer Contracts [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
Support Agreements and Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
Existing Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
Core Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
Customer Contracts And Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
Noncompete Agreements [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
OEM Customer Contracts [Member]
Y
Business Acquisition [Line Items]                                                                              
Acquired finite-lived intangible asset, estimated useful life (in years)                 10 4 5   0.0 4.0 4.0 0.0 0.0 0.0   6.0 5.0 0.0 6.0 2.0 0.0   0.0 6.0 6.0 0.0 0.0 0.0   7.0 5.0 0.0 7.0 0.0 2.0
Acquired Finite-lived Intangible Asset, Amount $ 116.5 $ 2.7 $ 92.2 $ 7.8 $ 10.7 $ 0.1 $ 0.2 $ 28.4 $ 21.9 $ 5.1 $ 1.4 $ 12.2 $ 0 $ 9.0 $ 3.2 $ 0 $ 0 $ 0 $ 26.6 $ 0.1 $ 24.3 $ 0 $ 2.1 $ 0.1 $ 0 $ 21.3 $ 0 $ 13.9 $ 4.6 $ 0 $ 0 $ 0 $ 56.4 $ 2.6 $ 45.0 $ 0 $ 8.6 $ 0 $ 0.2
Acquired Indefinite-lived Intangible Asset, Amount $ 2.8                     $ 0             $ 0             $ 2.8             $ 0            
Acquired Infinite Lived Intangible Asset Weighted Average Useful Life                       0.0             0.0             0.0             0.0