Goodwill And Intangible Assets (Summary Of Goodwill) (Details) (USD $)	6 Months Ended
	Apr. 30, 2012
Goodwill And Intangible Assets [Abstract]
Balance at October 31, 2011	$ 1,289,286,000
Additions	340,428,000	[1]
Adjustments	701,000	[2]
Balance at April 30, 2012	1,630,415,000
Adjustment related to achievement of certain milestones relating to contingent consideration for an acquisition that closed prior to fiscal 2010	1,800,000
Effects of foreign currency fluctuations	$ (1,100,000)

[1] Addition relates to acquisitions in the current period.

[2] Adjustment relates to achievement of certain milestones relating to contingent consideration for an acquisition that closed prior to fiscal 2010 of $1.8 million and effects of foreign currency fluctuations of $(1.1) million.