Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Cash flow from operating activities:
Net income	$ (3,691)	$ 86,588
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Amortization and depreciation	43,920	49,464
Stock compensation	32,323	25,834
Allowance for doubtful accounts	368	229
(Gain) loss on sale of investments	4	(1)
Write-down of long-term investments	0	1,300
Deferred income taxes	46,172	12,989
Net changes in operating assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	(34,811)	122,192
Prepaid and other current assets	(30,592)	(24,893)
Other long-term assets	(25,635)	(13,931)
Accounts payable and accrued liabilities	(139,864)	(129,316)
Income taxes	(18,017)	(14,201)
Deferred revenue	70,458	(69,372)
Net cash (used in) provided by operating activities	(59,365)	46,882
Cash flows from investing activities:
Proceeds from sales and maturities of short-term investments	12,449	37,284
Purchases of short-term investments	0	(35,338)
Purchases of property and equipment	(28,316)	(18,178)
Cash paid for acquisitions and intangible assets, net of cash acquired	608,344	187,624
Capitalization of software development costs	807	1,033
Other	0	2,100
Net cash used in investing activities	(625,018)	(202,789)
Cash flows from financing activities:
Proceeds from credit facilities and term loan	450,000	150,000
Repayment of debt	(21,875)	(35,000)
Issuances of common stock	12,486	7,205
Payments for taxes related to net share settlement of equity awards	(10,247)	(6,887)
Purchase of equity forward contract	(20,000)	(20,000)
Purchases of treasury stock	(180,000)	(80,000)
Other	0	559
Net cash provided by financing activities	230,364	15,877
Effect of exchange rate changes on cash and cash equivalents	11,555	(8,881)
Net change in cash and cash equivalents	(442,464)	(148,911)
Cash and cash equivalents, beginning of year	1,048,356	976,620
Cash and cash equivalents, end of period	$ 605,892	$ 827,709