Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011
Cash flow from operating activities:
Net income	$ 153,321	$ 181,422
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and depreciation	115,076	96,959
Stock compensation	54,078	41,430
Allowance for doubtful accounts	973	910
Write-down of long-term investments	452	999
Gain on sale of investments	(650)	(829)
Deferred income taxes	10,553	(4,891)
Net changes in operating assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	14,401	6,780
Prepaid and other current assets	6,116	(7,560)
Other long-term assets	(7,146)	(7,681)
Accounts payable and other liabilities	(15,490)	(17,285)
Income taxes	(32,370)	(38,998)
Deferred revenue	83,822	116,034
Net cash provided by operating activities	383,136	367,290
Cash flows from investing activities:
Proceeds from sales and maturities of short-term investments	166,132	104,013
Purchases of short-term investments	(18,179)	(92,611)
Proceeds from sales of long-term investments	506
Purchases of property and equipment	(32,718)	(42,836)
Cash paid for acquisitions and intangible assets, net of cash acquired	(584,418)	(5,382)
Capitalization of software development costs	(2,308)	(2,269)
Net cash used in investing activities	(470,985)	(39,085)
Cash flows from financing activities:
Principal payments on capital leases	(5,177)	(4,592)
Proceeds from credit facility and term loan	250,000
Repayment of debt	(128,656)
Issuances of common stock	128,556	119,826
Purchases of treasury stock	(40,000)	(334,985)
Net cash provided by (used in) financing activities	204,723	(219,751)
Effect of exchange rate changes on cash and cash equivalents	(8,184)	6,025
Net change in cash and cash equivalents	108,690	114,479
Cash and cash equivalents, beginning of year	855,077	775,407
Cash and cash equivalents, end of period	$ 963,767	$ 889,886