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Insurance (Tables)
 3 Months Ended
Jan. 31, 2017
Insurance [Abstract]  
Insurance Disclosure Table
Instruments Used to Collateralize Our Insurance Obligations
(in millions)
January 31, 2017
 
October 31, 2016
Standby letters of credit
$
125.3

 
$
118.3

Surety bonds
60.0

 
57.2

Restricted insurance deposits
11.2

 
11.2

Total
$
196.5

 
$
186.7