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Income Taxes (Tables)
 3 Months Ended
Mar. 31, 2014
Income Tax Disclosure [Abstract]  
Schedule of Effective Income Tax Rate Reconciliation
Income taxes were different from the amount computed by applying the federal income tax rate to income (loss) before income taxes for the following reasons for the periods indicated:
 
Three Months Ended March 31,
 
2014
 
2013
Income (loss) before income taxes
$
302.3

 
$
(214.3
)
Tax rate
35.0
%
 
35.0
%
Income tax expense (benefit) at federal statutory rate
105.8

 
(75.0
)
Tax effect of:
 
 
 
Valuation allowance
(53.0
)
 
104.2

Dividend received deduction 
(25.8
)
 
(21.9
)
Audit settlement
(1.1
)
 
(2.1
)
State tax expense (benefit)
6.5

 
4.1

Noncontrolling interest
(4.7
)
 
4.7

Tax credits 
—

 
(4.6
)
Non-deductible expenses
0.4

 
4.3

Other
2.6

 
(2.5
)
Income tax expense (benefit)
$
30.7

 
$
11.2