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Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2017
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
The following table provides information by level for assets and liabilities that are measured at fair value on a recurring basis as of September 30, 2017 and December 31, 2016:
 
September 30, 2017
Quoted Prices in Active Markets for Identical Assets
(Level 1)
Significant Other Observable Inputs
(Level 2)
Unobservable Inputs
(Level 3)
Assets:
 
 
 
 
Trading securities
$
0.3

$
0.3


$
—

 
 
 
 
 
 
December 31, 2016
Quoted Prices in Active Markets for Identical Assets
(Level 1)
Significant Other Observable Inputs
(Level 2)
Unobservable Inputs
(Level 3)
Assets:
 
 
 
 
Trading securities
$
2.5

$
2.5


$
—

Liabilities:
 
 
 
 
Contingent consideration associated with CDI acquisition
$
0.3

$
—

$
—

$
0.3