Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012 400 WCC	Jun. 30, 2012 200 WCC	Jul. 17, 2012 MaxLinear item	May 13, 2012 MaxLinear item
Operating Leases
Purchase option price for buildings	$ 44.3	$ 50.1
Contingent liability on sale of leased property to third party	$ 35.3	$ 40.0
Patent Litigation
Number of alleged patent infringements			20
Number of patents which plaintiff is seeking a declaratory judgment of no infringement				19