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Liabilities and Restructuring Charges - Components of Other Long Term Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2015
Oct. 31, 2014
Liabilities, Other than Long-term Debt, Noncurrent [Abstract]    
Deferred compensation liability $ 157,537us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent $ 145,508us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent
Other long-term liabilities 39,992us-gaap_OtherSundryLiabilitiesNoncurrent 13,464us-gaap_OtherSundryLiabilitiesNoncurrent
Total $ 197,529us-gaap_OtherLiabilitiesNoncurrent $ 158,972us-gaap_OtherLiabilitiesNoncurrent [1]
[1] Derived from audited financial statements.