Debt (Details) (USD $)	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Debt Disclosure Details [Line Items]
Senior unsecured revolving credit facility	$ 300,000,000
Senior unsecured revolving credit facility maturity date	Oct. 21, 2019
2017 senior notes principal value repurchased		250,000,000
Carrying value of debt	573,655,000	573,499,000
Senior Notes 2023 [Member]
Debt Disclosure Details [Line Items]
Prinicipal amount of debt issued		325,000,000
Net proceeds from issuance of long-term debt		321,300,000
Interest rate on unsecured senior note debt		3.625%
Unsecured senior note debt maturity date		Jun. 15, 2023
Carrying value of debt	323,700,000	323,500,000
Tendered Notes [Member]
Debt Disclosure Details [Line Items]
2017 senior notes principal value repurchased		250,000,000
Consideration paid to the holders of the tendered notes		301,500,000
Reference interest rate		0.625 percent U.S. Treasury Notes due September 30, 2017
Treasury spread		0.30%
Closing date tender offer		Jun. 28, 2013
Date of last interest payment		Apr. 02, 2013
Call premium on debt extinguishment		51,500,000
Accrued interest portion of payment made to noteholders upon repayment of long-term debt		$ 3,900,000
Senior Notes 2017 [Member]
Debt Disclosure Details [Line Items]
Interest rate on unsecured senior note debt		6.50%