Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Cash flow from operating activities:
Net income	$ 259,124	$ 247,800	$ 182,402
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and depreciation	192,826	187,404	156,840
Stock compensation	79,440	67,511	71,414
Allowance for doubtful accounts	(1,250)	102	3,754
Write-down of long-term investments	0	0	452
(Gain) loss on sale of investments	(6,999)	(868)	(650)
Deferred income taxes	(17,100)	(676)	12,850
Net changes in operating assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	(65,018)	37,590	(53,395)
Prepaid and other current assets	1,836	(12,063)	15,199
Other long-term assets	(23,270)	(27,468)	(10,231)
Accounts payable and accrued liabilities	40,645	(1,135)	42,960
Income taxes	(9,095)	(2,306)	(43,113)
Deferred revenue	99,814	814	107,586
Net cash provided by operating activities	550,953	496,705	486,068
Cash flows from investing activities:
Proceeds from sales and maturities of short-term investments	0	0	166,132
Purchases of short-term investments	0	0	(18,179)
Proceeds from sales of long-term investments	7,774	989	506
Proceeds from sale of property and equipment	0	2,000	0
Purchases of property and equipment	(103,275)	(65,459)	(54,191)
Cash paid for acquisitions and intangible assets, net of cash acquired	(394,623)	0	(970,089)
Capitalization of software development costs	(3,638)	(3,609)	(3,302)
Other	(3,488)	0	0
Net cash used in investing activities	(497,250)	(66,079)	(879,123)
Cash flows from financing activities:
Acquisition of non-controlling interests	0	(44,004)	0
Proceeds from credit facility and term loan	200,000	0	250,000
Repayment of debt	(230,968)	(30,712)	(136,156)
Issuances of common stock	82,083	131,914	175,896
Purchases of treasury stock	(119,747)	(145,016)	(40,000)
Other	(5,057)	(10,167)	(6,252)
Net cash provided by (used in) financing activities	(73,689)	(97,985)	243,488
Effect of exchange rate changes on cash and cash equivalents	(16,693)	(10,582)	(5,128)
Net change in cash and cash equivalents	(36,679)	322,059	(154,695)
Cash and cash equivalents, beginning of year	1,022,441	700,382	855,077
Cash and cash equivalents, end of year	985,762	1,022,441	700,382
Supplemental Disclosure of Cash Flow Information:
Cash paid for income taxes during the year:	40,741	31,326	49,208
Interest payments during the year:	$ 1,904	$ 1,761	$ 1,961