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Derivative Financial Instruments (Tables)
6 Months Ended
Jun. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of amount of derivative instrument gains and (losses) before taxes
The following summarizes the amount of derivative instrument gains and losses reported in the Consolidated Statements of Comprehensive Income:
 
For the Three Months Ended June 30,
 
For the Six Months Ended June 30,
Cash Flow Hedges
2012
 
2013
 
2012
 
2013
Interest rate swaps
$
(0.8
)
 
$
1.0

 
$
(0.9
)
 
$
1.3

Schedule of location and fair values of derivative instruments on the Consolidated Balance Sheet
The following summarizes the location and fair values of derivative instruments on the Consolidated Balance Sheets:
Cash Flow Hedges
December 31,
2012
 
June 30,
2013
Interest rate swaps(1)
$
(4.0
)
 
$
(2.7
)
___________________________________________________________

(1)
Presented within Other long-term liabilities.