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Other Current Liabilities
12 Months Ended
Dec. 31, 2017
Other Liabilities, Current [Abstract]  
Other Current Liabilities
Other Current Liabilities
Other current liabilities consisted of the following:
(in millions)
December 31,
2017
 
December 31,
2016
Accrued payroll
$
84.6

 
$
79.3

Accrued legal and regulatory
46.3

 
35.9

Accrued employee benefits
34.1

 
31.8

Deferred revenue
13.2

 
12.0

Income taxes payable
8.5

 
11.5

Accrued interest
1.5

 
1.3

Contingent consideration
1.1

 
16.1

Other
18.5

 
20.8

Total other current liabilities
$
207.8

 
$
208.7


Contingent consideration decreased $15.0 million primarily due to payments made under various contingent consideration clauses of contracts we have entered into to acquire businesses. See Note 15, “Fair Value,” for additional information related to these contingent consideration obligations.