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Other Assets (Tables)
 6 Months Ended
Jun. 30, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other assets
Other assets consisted of the following:
(in millions)
 
June 30, 
 2016
 
December 31, 2015
Investments in affiliated companies
 
$
61.0

 
$
50.5

Other investments
 
13.6

 
13.0

Marketable securities
 
11.8

 
11.2

Deposits
 
2.8

 
1.8

Deferred financing fees
 
1.5

 
1.7

Other
 
1.1

 
1.3

Total other assets
 
$
91.8

 
$
79.5