Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Cash flow from operating activities:
Net income	$ 98,781	$ 139,894
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and depreciation	96,829	97,044
Stock compensation	65,288	51,396
Allowance for doubtful accounts	3,367	679
(Gain) loss on sale of investments	4	(1)
(Gain) loss on sale of property and equipment	(97)	0
Write-down of long-term investments	0	1,300
Deferred income taxes	38,878	3,339
Net changes in operating assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	(105,457)	81,098
Prepaid and other current assets	(47,664)	(13,291)
Other long-term assets	(21,753)	(24,021)
Accounts payable and accrued liabilities	(131,763)	(23,341)
Income taxes	(44,577)	(11,436)
Deferred revenue	52,229	(132,803)
Net cash provided by operating activities	4,065	169,857
Cash flows from investing activities:
Proceeds from sales and maturities of short-term investments	12,449	94,512
Purchases of short-term investments	0	(94,182)
Proceeds from sales of property and equipment	1,662	0
Purchases of property and equipment	(48,612)	(31,195)
Cash paid for acquisitions and intangible assets, net of cash acquired	(643,537)	(187,624)
Capitalization of software development costs	(1,760)	(2,066)
Other	0	2,100
Net cash used in investing activities	(679,798)	(218,455)
Cash flows from financing activities:
Proceeds from credit facilities and term loan	450,000	250,000
Repayment of debt	(69,687)	(36,875)
Issuances of common stock	58,975	62,254
Payments for taxes related to net share settlement of equity awards	(11,883)	(8,058)
Purchase of equity forward contract	0	(20,000)
Purchases of treasury stock	(235,000)	(180,000)
Other	0	(482)
Net cash provided by financing activities	192,405	66,839
Effect of exchange rate changes on cash and cash equivalents	5,773	(3,536)
Net change in cash and cash equivalents	(477,555)	14,705
Cash and cash equivalents, beginning of year	1,048,356	976,620
Cash and cash equivalents, end of period	$ 570,801	$ 991,325