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

 
$
105.4

Surety bonds
57.2

 
55.9

Restricted insurance deposits
11.2

 
11.4

Total
$
188.5

 
$
172.7