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Insurance (Tables)
 6 Months Ended
Apr. 30, 2016
Insurance [Abstract]  
Insurance Disclosure Table
Instruments Used to Collateralize Our Insurance Obligations
(in millions)
April 30, 2016
 
October 31, 2015
Standby letters of credit
$
120.1

 
$
105.4

Surety bonds
55.9

 
55.9

Restricted insurance deposits
11.4

 
11.4

Total
$
187.4

 
$
172.7