Fair Value Measures (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands	Jul. 31, 2011	Oct. 31, 2010
Total assets	$ 830,203	$ 739,363
Total liabilities	10,758	21,236
Contingent Consideration [Member]
Accounts payable and accrued liabilities	2,065	3,121
Other long-term liabilities	2,161	4,935
Contingent Consideration [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Accounts payable and accrued liabilities
Other long-term liabilities
Contingent Consideration [Member] | Significant Other Observable Inputs (Level 2) [Member]
Accounts payable and accrued liabilities
Other long-term liabilities
Contingent Consideration [Member] | Significant Unobservable Inputs (Level 3) [Member]
Accounts payable and accrued liabilities	2,065	3,121
Other long-term liabilities	2,161	4,935
Deferred Compensation Plan Assets [Member]
Other long-term assets	93,253	83,330
Deferred Compensation Plan Assets [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Other long-term assets	93,253	83,330
Deferred Compensation Plan Assets [Member] | Significant Other Observable Inputs (Level 2) [Member]
Other long-term assets
Deferred Compensation Plan Assets [Member] | Significant Unobservable Inputs (Level 3) [Member]
Other long-term assets
Forward Currency Derivative Contracts [Member]
Prepaid and other current assets	8,853	5,680
Accounts payable and accrued liabilities	6,532	13,180
Forward Currency Derivative Contracts [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Prepaid and other current assets
Accounts payable and accrued liabilities
Forward Currency Derivative Contracts [Member] | Significant Other Observable Inputs (Level 2) [Member]
Prepaid and other current assets	8,853	5,680
Accounts payable and accrued liabilities	6,532	13,180
Forward Currency Derivative Contracts [Member] | Significant Unobservable Inputs (Level 3) [Member]
Prepaid and other current assets
Accounts payable and accrued liabilities
Money Market Funds (U.S.) [Member]
Cash and cash equivalents	579,702	487,199
Money Market Funds (U.S.) [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Cash and cash equivalents	579,702	487,199
Money Market Funds (U.S.) [Member] | Significant Other Observable Inputs (Level 2) [Member]
Cash and cash equivalents
Money Market Funds (U.S.) [Member] | Significant Unobservable Inputs (Level 3) [Member]
Cash and cash equivalents
Municipal Securities [Member]
Short-term investments	148,395	163,154
Municipal Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Short-term investments
Municipal Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Short-term investments	148,395	163,154
Municipal Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Short-term investments
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Total assets	672,955	570,529
Total liabilities
Significant Other Observable Inputs (Level 2) [Member]
Total assets	157,248	168,834
Total liabilities	6,532	13,180
Significant Unobservable Inputs (Level 3) [Member]
Total assets
Total liabilities	$ 4,226	$ 8,056