Other Financial Information, Deferred Revenue (Details) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Deferred Product Revenue [Abstract]
Deferred revenue, net	$ 885,800,000	$ 884,400,000
Deferred Revenue Reported as [Abstract]
Deferred Revenue, Current	668,824,000	660,264,000
Deferred Revenue, Noncurrent	216,968,000	224,165,000
Sales Revenue, Goods, Net [Member]
Deferred Product Revenue [Abstract]
Undelivered product commitments and other product deferrals	277,800,000	294,100,000
Distributor inventory and other sell-through items	130,100,000	143,400,000
Deferred gross product revenue	407,900,000	437,500,000
Deferred cost of product revenue	(130,600,000)	(148,800,000)
Deferred revenue, net	277,300,000	288,700,000
Sales Revenue, Services, Net [Member]
Deferred Product Revenue [Abstract]
Deferred revenue, net	$ 608,500,000	$ 595,700,000