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Insurance (Tables)
 12 Months Ended
Oct. 31, 2018
Insurance [Abstract]  
Schedule of Insurance Related Balances and Activity
Insurance Related Balances and Activity
(in millions)
October 31, 2018
 
October 31, 2017
Insurance claim reserves, excluding medical and dental
$
501.4

 
$
485.6

Medical and dental claim reserves
8.9

 
9.8

Insurance recoverables
73.7

 
73.1
Schedule of Casualty Program Insurance Reserves Rollforward
Casualty Program Insurance Reserves Rollforward
 
 
Years Ended October 31,
(in millions)
 
2018
 
2017
 
2016
Net balance at beginning of year
 
$
412.5

 
$
348.2

 
$
312.7

Change in case reserves plus IBNR Claims — current year
 
131.4

 
112.2

 
104.5

Change in case reserves plus IBNR Claims — prior years
 
10.2

 
23.1

 
35.8

Claims paid
 
(126.5
)
 
(105.2
)
 
(104.8
)
GCA acquisition
 
0.1

 
34.1

 
—

Net balance, October 31(1)
 
427.7

 
412.5

 
348.2

Recoverables
 
73.7

 
73.1

 
69.7

Gross balance, October 31
 
$
501.4

 
$
485.6

 
$
417.9

(1) Includes reserves related to discontinued operations of approximately $3 million for 2018, $10 million for 2017, and $12 million for 2016.
Schedule of Instruments Used to Collateralize Insurance Obligations
Instruments Used to Collateralize Our Insurance Obligations
 
As of October 31,
(in millions)
2018
 
2017
Standby letters of credit
$
144.1

 
$
137.6

Surety bonds
89.2

 
77.5

Restricted insurance deposits
0.6

 
11.2

Total
$
233.9

 
$
226.3