Other Financial Information, Deferred Revenue (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Deferred Product Revenue [Abstract]
Deferred revenue, net	$ 967,000,000	$ 884,400,000
Deferred Revenue Reported as [Abstract]
Deferred Revenue, Current	712,663,000	660,264,000
Deferred Revenue, Noncurrent	254,364,000	224,165,000
Sales Revenue, Goods, Net [Member]
Deferred Product Revenue [Abstract]
Undelivered product commitments and other product deferrals	288,100,000	294,100,000
Distributor inventory and other sell-through items	134,000,000	143,400,000
Deferred gross product revenue	422,100,000	437,500,000
Deferred cost of product revenue	(136,900,000)	(148,800,000)
Deferred revenue, net	285,200,000	288,700,000
Sales Revenue, Services, Net [Member]
Deferred Product Revenue [Abstract]
Deferred revenue, net	$ 681,800,000	$ 595,700,000