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Other Assets (Tables)
9 Months Ended
Sep. 30, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Summary of prepaid expenses and other current assets A summary of prepaid expenses and other current assets as of September 30, 2018 and December 31, 2017 follows:
 
2018
 
2017
Prepaid expenses
$
104.2

 
$
78.6

Inventories
55.4

 
51.2

Other non-trade receivables
47.3

 
28.6

Reinsurance receivable
25.9

 
23.1

Income tax receivable
17.3

 
59.7

Commodity and fuel hedge assets
2.0

 
3.0

Other current assets
2.1

 
3.4

Total
$
254.2

 
$
247.6

Summary of other assets A summary of other assets as of September 30, 2018 and December 31, 2017 follows:
 
2018
 
2017
Deferred compensation plan
$
105.1

 
$
99.9

Deferred contract costs and sales commissions
90.4

 
43.6

Reinsurance receivable
70.0

 
65.9

Investments
38.9

 
27.2

Amounts recoverable for capping, closure and post-closure obligations
30.4

 
29.9

Interest rate swaps and locks
29.6

 
27.1

Deferred financing costs
4.5

 
3.0

Other
40.0

 
38.6

Total
$
408.9

 
$
335.2