Insurance - Standby Letters of Credit, Surety Bonds and Restricted Insurance Deposits Outstanding to Collateralize Self-Insurance Obligations (Detail) - USD ($) $ in Millions	Jan. 31, 2017	Oct. 31, 2016
Letters Of Credit
Total Instruments Used To Collateralize Insurance Obligations	$ 196.5	$ 186.7
Standby Letters of Credit
Letters Of Credit
Instruments Used To Collateralize Insurance Obligations	125.3	118.3
Surety Bond
Letters Of Credit
Instruments Used To Collateralize Insurance Obligations	60.0	57.2
Rejected insurance deposits
Letters Of Credit
Instruments Used To Collateralize Insurance Obligations	$ 11.2	$ 11.2