Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Revenue:
Products	$ 2,318,581	$ 2,117,472	$ 2,002,395
Services	483,106	483,101	443,274
Total revenue	2,801,687	2,600,573	2,445,669
Cost of goods sold:
Products	1,308,295	1,176,304	1,120,373
Services	247,606	262,693	249,733
Total cost of goods sold	1,555,901	1,438,997	1,370,106
Gross profit	1,245,786	1,161,576	1,075,563
Operating expenses:
Research and development	475,329	451,794	414,201
Selling and marketing	356,169	349,731	333,836
General and administrative	142,604	132,828	123,402
Amortization of intangible assets	33,029	61,508	69,511
Acquisition and integration costs	0	4,613	25,539
Significant asset impairments and restructuring costs	23,933	4,933	8,626
Total operating expenses	1,031,064	1,005,407	975,115
Income from operations	214,722	156,169	100,448
Interest and other income (loss), net	(2,744)	(12,795)	(25,505)
Interest expense	(55,852)	(56,656)	(51,179)
Income before income taxes	156,126	86,718	23,764
Provision (benefit) for income taxes	(1,105,827)	14,134	12,097
Net income	$ 1,261,953	$ 72,584	$ 11,667
Basic net income per common share (in dollars per share)	$ 8.89	$ 0.52	$ 0.10
Diluted net income per potential common share (in dollars per share)	$ 7.53	$ 0.51	$ 0.10
Weighted average basic common shares outstanding (in shares)	141,997	138,312	118,416
Weighted average diluted potential common shares outstanding (in shares)	169,919	150,704	120,101