Summary of Significant Accounting Policies - Schedule of Topic 606 Impact Income Statement (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	$ 820,401	$ 769,426
Amortization of intangible assets	17,443	19,008
Total cost of revenue	192,892	181,156
Gross margin	627,509	588,270
Research and development	271,326	264,411
Sales and marketing	155,959	150,512
General and administrative	42,061	56,372
Amortization of intangible assets	10,784	9,539
Restructuring	(35)	(282)
Total operating expenses	480,095	480,552
Operating income	147,414	107,718
Other income (expense), net	(359)	12,385
Income before income taxes	147,055	120,103
Provision (benefit) for income taxes	(6,459)	123,794
Net income (loss)	$ 153,514	$ (3,691)
Basic (in USD per share)	$ 1.03	$ (0.02)
Diluted (in USD per share)	$ 1.01	$ (0.02)
Basic (shares)	149,288	149,441
Diluted (shares)	152,661	149,441
Time-based products
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	$ 553,716	$ 570,933
Cost of revenue	116,620	111,394
Upfront products
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	130,513	91,604
Maintenance and service
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	136,172	106,889
Cost of revenue	58,829	$ 50,754
Adjustments | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	(22,344)
Amortization of intangible assets	0
Total cost of revenue	0
Gross margin	(22,344)
Research and development	0
Sales and marketing	11,184
General and administrative	0
Amortization of intangible assets	0
Restructuring	0
Total operating expenses	11,184
Operating income	(33,528)
Other income (expense), net	0
Income before income taxes	(33,528)
Provision (benefit) for income taxes	(5,670)
Net income (loss)	$ (27,858)
Basic (in USD per share)	$ (0.19)
Diluted (in USD per share)	$ (0.19)
Adjustments | Accounting Standards Update 2014-09 | Time-based products
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	$ 15,856
Cost of revenue	0
Adjustments | Accounting Standards Update 2014-09 | Upfront products
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	(16,786)
Adjustments | Accounting Standards Update 2014-09 | Maintenance and service
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	(21,414)
Cost of revenue	0
Adjusted balance under ASC 605
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	798,057
Amortization of intangible assets	17,443
Total cost of revenue	192,892
Gross margin	605,165
Research and development	271,326
Sales and marketing	167,143
General and administrative	42,061
Amortization of intangible assets	10,784
Restructuring	(35)
Total operating expenses	491,279
Operating income	113,886
Other income (expense), net	(359)
Income before income taxes	113,527
Provision (benefit) for income taxes	(12,129)
Net income (loss)	$ 125,656
Basic (in USD per share)	$ 0.84
Diluted (in USD per share)	$ 0.82
Basic (shares)	149,288
Diluted (shares)	152,661
Adjusted balance under ASC 605 | Time-based products
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	$ 569,572
Cost of revenue	116,620
Adjusted balance under ASC 605 | Upfront products
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	113,727
Adjusted balance under ASC 605 | Maintenance and service
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	114,758
Cost of revenue	$ 58,829