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Income Taxes (Tables)
6 Months Ended
Jun. 30, 2016
Income Tax Disclosure [Abstract]  
Schedule of Effective Income Tax Rate Reconciliation
The following table shows our effective tax rate for the three months and six months ended June 30, 2016 and June 30, 2015:
 
 
 
Three months ended June 30
 
Six months ended June 30
(in millions)
 
2016

 
2015

 
2016

 
2015

Income before income taxes and equity in net income of unconsolidated entities
 
$
47.4

 
$
50.3

 
$
90.2

 
$
94.6

Equity in net income (loss) of unconsolidated entities
 
(0.2
)
 
0.6

 
0.3

 
1.0

Net income attributable to noncontrolling interest
 

 

 

 
(0.2
)
Total
 
$
47.2

 
$
50.9

 
$
90.5

 
$
95.4

Income tax expense
 
$
15.4

 
$
18.7

 
$
30.0

 
$
33.6

Effective tax rate
 
32.7
%
 
36.7
%
 
33.2
%
 
35.2
%
Schedule of Gross Unrecognized Tax Benefits
The table below provides information concerning our gross unrecognized tax benefits as of June 30, 2016 and December 31, 2015, as well as the effect these gross unrecognized tax benefits would have on our income tax expense, if they were recognized.
 
 
As of June 30
 
As of December 31
(in millions)
 
2016

 
2015

Gross unrecognized tax benefits
 
$
16.1

 
$
14.5

Gross unrecognized tax benefits that would affect income tax expense
 
$
12.1

 
$
10.5

Decrease in income tax expense upon recognition of gross unrecognized tax benefits
 
$
10.8

 
$
9.4

Schedule of Liabilities for Unrecognized Tax Benefits
Our Unaudited Condensed Consolidated Balance Sheets include the following liabilities for unrecognized tax benefits. These amounts include interest and penalties, less any associated tax benefits.

 
 
As of June 30
 
As of December 31
Liabilities for Unrecognized Tax Benefits (in millions)
 
2016

 
2015

Current liability
 
$
4.6

 
$
4.2

Non-current liability
 
7.1

 
6.0

Total liability for unrecognized tax benefits
 
$
11.7

 
$
10.2