Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Apr. 30, 2016		Apr. 30, 2015
Cash flow from operating activities:
Net income	$ 129,411		$ 120,785
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and depreciation	107,226		102,051
Stock compensation	46,472		40,864
Allowance for doubtful accounts	450		600
(Gain) loss on sale of investments	(10)		(17)
Excess tax benefits from stock-based compensation	(920)		0
Deferred income taxes	(9,984)		27,636
Net changes in operating assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	93,619		(16,491)
Prepaid and other current assets	(23,208)		(34,584)
Other long-term assets	656		(13,359)
Accounts payable and accrued liabilities	(108,005)		(62,142)
Income taxes	4,409		(27,077)
Deferred revenue	(52,852)		(70,530)
Net cash provided by operating activities	187,264		67,736
Cash flows from investing activities:
Proceeds from sales and maturities of short-term investments	75,570		17,721
Purchases of short-term investments	(79,079)		(154,744)
Proceeds from sales of long-term investments	1,785		0
Purchases of property and equipment	(28,900)		(43,979)
Cash paid for acquisitions and intangible assets, net of cash acquired	(46,100)		(2,303)
Capitalization of software development costs	(1,973)		(1,865)
Payments for (Proceeds from) Other Investing Activities	0		(900)
Net cash used in investing activities	(78,697)		(184,270)
Cash flows from financing activities:
Proceeds from credit facility	60,000		250,000
Repayment of debt	(15,000)		(105,424)
Issuances of common stock	36,783		54,006
Purchase of equity forward contract	(20,000)		(36,000)
Purchases of treasury stock	(180,000)		(144,000)
Excess tax benefits from stock-based compensation	920		0
Other	(1,470)		(116)
Net cash provided by (used in) financing activities	(118,767)		18,466
Effect of exchange rate changes on cash and cash equivalents	1,958		(18,849)
Net change in cash and cash equivalents	(8,242)		(116,917)
Cash and cash equivalents, beginning of year	836,188	[1]	985,762
Cash and cash equivalents, end of period	$ 827,946		$ 868,845

[1] Derived from audited financial statements.