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Income Taxes (Tables)
 3 Months Ended
Mar. 31, 2017
Income Tax Disclosure [Abstract]  
Reconciliation between the statutory U.S. Federal income tax rate and the Company's effective income tax rate on income before income taxes
The following is a reconciliation between the statutory U.S. federal income tax rate and the Company’s effective income tax rate on income before income taxes:
 
Three Months Ended
March 31,
 
2017
 
2016
Statutory rate
35.0
 %
 
35.0
 %
State taxes
1.4

 
1.1

Noncontrolling interest in partially-owned subsidiaries
(0.4
)
 
(1.3
)
Changes in valuation allowance and reserves
0.2

 
—

Settlements with tax authorities
(8.0
)
 
—

Other, net
0.5

 
1.2

Effective rate
28.7
 %
 
36.0
 %
Change in unrecognized tax benefits
The change in unrecognized tax benefits for the three months ended March 31, 2017 and 2016 was as follows:
 
Three Months Ended
March 31,
 
2017
 
2016
 
(in millions)
Beginning balance
$
28.2

 
$
65.2

Additions for tax positions related to the current year
—

 
1.5

Additions for tax positions of prior years
0.1

 
1.0

Reductions for tax positions of prior years
—

 
(0.1
)
Settlements
(23.3
)
 
—

Ending balance
$
5.0

 
$
67.6