Subsequent Events Subsequent Events (Schedule of Purchase Price Allocation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 30, 2016	May. 27, 2016	Apr. 30, 2016	Oct. 31, 2015
Business Acquisition [Line Items]
Accrued employee compensation			$ 133,511	$ 142,075
Non-current deferred revenue			74,434	72,065
Goodwill			$ 1,621,691	$ 1,617,161
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Business Acquisition [Line Items]
Total preliminary estimated purchase price	$ 1,200,000
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Business Acquisition [Line Items]
Cash		$ 59,714
Restricted cash		5,000
Short-term investments		166,934
Accounts receivable		80,256
Inventories		64,000
Prepaid expenses and other current assets		9,185
Property and equipment, net		27,888
Identifiable intangible assets		422,000
Non-current deferred tax assets		70,944
Other assets		1,767
Total assets acquired		907,688
Accounts payable		23,074
Accrued employee compensation		17,100
Deferred revenue		13,947
Other accrued liabilities		11,209
Non-current deferred revenue		10,420
Non-current deferred tax liability		172,265
Other non-current liabilities		3,274
Total liabilities assumed		251,289
Net assets acquired		656,399
Total preliminary estimated purchase price	$ 1,245,090
Goodwill		$ 588,691