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Fair Value (Tables)
12 Months Ended
Dec. 31, 2016
Fair Value Disclosures [Abstract]  
Financial instruments measured at fair value, on a recurring basis
The following table summarizes financial instruments measured at fair value, on a recurring basis, as of December 31, 2016:
(in millions)
Total
 
Level 1
 
Level 2
 
Level 3
Assets
 
 
 
 
 
 
 
Trading securities
$
12.4

 
$
8.2

 
$
4.2

 
$

Available-for-sale securities
3.3

 

 
3.3

 

Total
$
15.7

 
$
8.2

 
$
7.5

 
$

 
 
 
 
 
 
 
 
Liabilities
 
 
 
 
 
 
 
Interest rate caps
$
(6.1
)
 
$

 
$
(6.1
)
 
$

Contingent consideration
(17.6
)
 

 

 
(17.6
)
Total
$
(23.7
)
 
$

 
$
(6.1
)
 
$
(17.6
)