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Insurance (Tables)
 12 Months Ended
Oct. 31, 2017
Insurance [Abstract]  
Schedule of Insurance Related Balances and Activity
Insurance Related Balances and Activity
(in millions)
October 31, 2017
 
October 31, 2016
Insurance claim reserves excluding medical and dental
$
485.6

 
$
417.9

Medical and dental claim reserves
9.8

 
5.9

Insurance recoverables
73.1

 
69.7
Schedule of Casualty Program Insurance Reserves Rollforward
Casualty Program Insurance Reserves Rollforward
 
 
Years Ended October 31,
(in millions)
 
2017
 
2016
 
2015
Net balance at beginning of year
 
$
348.2

 
$
312.7

 
$
277.8

Change in case reserves plus IBNR Claims — current year
 
112.2

 
104.5

 
88.7

Change in case reserves plus IBNR Claims — prior years
 
23.1

 
35.8

 
40.1

Claims paid
 
(105.2
)
 
(104.8
)
 
(93.9
)
GCA Services acquisition
 
34.1

 
—

 
—

Net balance, October 31(1)
 
412.5

 
348.2

 
312.7

Recoverables
 
73.1

 
69.7

 
65.9

Gross balance, October 31
 
$
485.6

 
$
417.9

 
$
378.6

(1) Includes reserves related to discontinued operations of approximately $10 million for 2017 and $12 million for both 2016 and 2015.
Schedule of Instruments Used to Collateralize Insurance Obligations
Instruments Used to Collateralize Our Insurance Obligations
 
As of October 31,
(in millions)
2017
 
2016
Standby letters of credit
$
137.6

 
$
118.3

Surety bonds
77.5

 
57.2

Restricted insurance deposits
11.2

 
11.2

Total
$
226.3

 
$
186.7