Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Cash flow from operating activities:
Net income	$ 256,645	$ 194,129
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and depreciation	144,112	157,814
Stock compensation	79,697	72,043
Allowance for doubtful accounts	1,289	650
(Gain) loss on sale of investments	(1)	(15)
Write-down of long-term investments	1,300	0
Deferred income taxes	(10,960)	2,747
Net changes in operating assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	42,413	77,532
Prepaid and other current assets	(13,636)	(22,941)
Other long-term assets	(33,416)	(8,118)
Accounts payable and accrued liabilities	36,129	(41,749)
Income taxes	(19,169)	(3,314)
Deferred revenue	(34,692)	10,195
Net cash provided by operating activities	449,711	438,973
Cash flows from investing activities:
Proceeds from sales and maturities of short-term investments	130,529	111,078
Purchases of short-term investments	(137,486)	(126,216)
Proceeds from sales of long-term investments	839	1,785
Purchases of long-term investments	0	(1,002)
Purchases of property and equipment	(50,227)	(48,249)
Cash paid for acquisitions and intangible assets, net of cash acquired	(187,624)	(60,056)
Capitalization of software development costs	(3,130)	(2,959)
Other	2,100	0
Net cash used in investing activities	(244,999)	(125,619)
Cash flows from financing activities:
Proceeds from credit facilities	270,000	185,000
Repayment of debt	(38,750)	(112,500)
Issuances of common stock	78,718	69,884
Payments for taxes related to net share settlement of equity awards	(35,376)	(25,718)
Purchase of equity forward contract	0	(25,000)
Purchases of treasury stock	(300,000)	(300,000)
Other	(482)	2,713
Net cash provided used in financing activities	(25,890)	(205,621)
Effect of exchange rate changes on cash and cash equivalents	(456)	2,396
Net change in cash and cash equivalents	178,366	110,129
Cash and cash equivalents, beginning of year	976,620	836,188
Cash and cash equivalents, end of period	$ 1,154,986	$ 946,317