Insurance - Standby Letters of Credit, Surety Bonds and Restricted Insurance Deposits Outstanding to Collateralize Self-Insurance Obligations (Details) - USD ($) $ in Millions	Oct. 31, 2016	Oct. 31, 2015
Letters Of Credit [Line Items]
Total Instruments Used To Collateralize Insurance Obligations	$ 186.7	$ 172.7
Standby letters of credit
Letters Of Credit [Line Items]
Instruments Used To Collateralize Insurance Obligations	118.3	105.4
Surety bonds
Letters Of Credit [Line Items]
Instruments Used To Collateralize Insurance Obligations	57.2	55.9
Restricted insurance deposits
Letters Of Credit [Line Items]
Instruments Used To Collateralize Insurance Obligations	$ 11.2	$ 11.4