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Income Taxes (Tables)
 9 Months Ended
Sep. 30, 2014
Income Tax Disclosure [Abstract]  
Reconciliation between the statutory United States Federal income tax rate and the Company's effective income tax rate from continuing operations
The following is a reconciliation between the statutory U.S. Federal income tax rate and the Company’s effective income tax rate on income from continuing operations:
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2014
 
2013
 
2014
 
2013
Statutory rate
35.0
 %
 
35.0
 %
 
35.0
 %
 
35.0
 %
State taxes
0.9

 
2.5

 
0.9

 
2.3

Domestic production activities deduction
(1.4
)
 
(2.7
)
 
(1.9
)
 
(1.6
)
Noncontrolling interest in partially-owned subsidiaries
(1.0
)
 
(1.0
)
 
(1.1
)
 
(0.9
)
Changes in valuation allowance and reserves
(0.2
)
 
(3.0
)
 
(0.1
)
 
(1.2
)
State adjustments
1.1

 
3.2

 
0.3

 
1.2

Other, net
(1.1
)
 
0.2

 
(0.3
)
 
0.1

Effective rate
33.3
 %
 
34.2
 %
 
32.8
 %
 
34.9
 %
Change in unrecognized tax benefits
The change in unrecognized tax benefits for the nine months ended September 30, 2014 and 2013 was as follows:
 
Nine Months Ended
September 30,
 
2014
 
2013
 
(in millions)
Beginning balance
$
55.0

 
$
48.7

Additions for tax positions related to the current year
3.7

 
3.4

Additions for tax positions of prior years
0.3

 
1.9

Reductions for tax positions of prior years
(0.1
)
 
—

Settlements
—

 
(0.1
)
Expiration of statute of limitations
—

 
(0.1
)
Ending balance
$
58.9

 
$
53.8