Fair Value Measures - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $) In Thousands, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	$ 563,872	$ 691,528
Total liabilities	11,755	5,731
Foreign Currency Derivative Contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Prepaid and other current assets	9,300	12,437
Accounts payable and accrued liabilities	11,755	5,238
Deferred Compensation Plan Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other long-term assets	145,508	126,621
Contingent Consideration
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accounts payable and accrued liabilities		493
Quoted Prices In Active Markets For Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	554,572	679,091
Total liabilities	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Foreign Currency Derivative Contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Prepaid and other current assets	0	0
Accounts payable and accrued liabilities	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Deferred Compensation Plan Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other long-term assets	145,508	126,621
Quoted Prices In Active Markets For Identical Assets (Level 1) | Contingent Consideration
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accounts payable and accrued liabilities		0
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	9,300	12,437
Total liabilities	11,755	5,238
Significant Other Observable Inputs (Level 2) | Foreign Currency Derivative Contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Prepaid and other current assets	9,300	12,437
Accounts payable and accrued liabilities	11,755	5,238
Significant Other Observable Inputs (Level 2) | Deferred Compensation Plan Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other long-term assets	0	0
Significant Other Observable Inputs (Level 2) | Contingent Consideration
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accounts payable and accrued liabilities		0
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	0	0
Total liabilities	0	493
Significant Unobservable Inputs (Level 3) | Foreign Currency Derivative Contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Prepaid and other current assets	0	0
Accounts payable and accrued liabilities	0	0
Significant Unobservable Inputs (Level 3) | Deferred Compensation Plan Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other long-term assets	0	0
Significant Unobservable Inputs (Level 3) | Contingent Consideration
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accounts payable and accrued liabilities		493
Money Market Funds (U.S.)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	409,064	552,470
Money Market Funds (U.S.) | Quoted Prices In Active Markets For Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	409,064	552,470
Money Market Funds (U.S.) | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Money Market Funds (U.S.) | Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	$ 0	$ 0