Unaudited Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Apr. 30, 2019	Jan. 31, 2019	Apr. 30, 2018	Jan. 31, 2018	Apr. 30, 2019	Apr. 30, 2018
Revenue:
Total revenue	$ 836,242		$ 776,836		$ 1,656,643	$ 1,546,262
Cost of revenue:
Amortization of intangible assets	14,881		20,450		32,324	39,458
Total cost of revenue	190,679		178,779		383,571	359,935
Gross margin	645,563		598,057		1,273,072	1,186,327
Operating expenses:
Research and development	290,299		252,134		561,625	516,545
Sales and marketing	158,652		147,188		314,611	297,700
General and administrative	56,351		58,809		98,412	115,181
Amortization of intangible assets	10,316		10,736		21,100	20,275
Restructuring	14,443		2,176		14,408	1,894
Total operating expenses	530,061		471,043		1,010,156	951,595
Operating income	115,502		127,014		262,916	234,732
Other income (expense), net	18,415		(7,715)		18,056	4,670
Income before income taxes	133,917		119,299		280,972	239,402
Provision (benefit) for income taxes	15,707		16,827		9,248	140,621
Net income	$ 118,210	$ 153,514	$ 102,472	$ (3,691)	$ 271,724	$ 98,781
Net income per share:
Basic (in USD per share)	$ 0.79		$ 0.69		$ 1.82	$ 0.66
Diluted (in USD per share)	$ 0.77		$ 0.67		$ 1.77	$ 0.64
Shares used in computing per share amounts:
Basic (shares)	149,712		149,034		149,500	149,245
Diluted (shares)	153,904		153,167		153,383	153,664
Time-based products
Revenue:
Total revenue	$ 558,305		$ 556,770		$ 1,112,021	$ 1,127,703
Cost of revenue:
Cost of revenue	116,010		108,199		232,630	219,593
Upfront products
Revenue:
Total revenue	143,401		99,960		273,914	191,564
Maintenance and service
Revenue:
Total revenue	134,536		120,106		270,708	226,995
Cost of revenue:
Cost of revenue	$ 59,788		$ 50,130		$ 118,617	$ 100,884