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Other Income (Expense), Net
 6 Months Ended
Jun. 30, 2013
Other Income and Expenses [Abstract]  
Other Income (Expense), Net
Other (Expense) Income, Net
Other (expense) income , net consisted of the following, for each period presented:
 
Quarter Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2013
 
2012
 
2013
 
2012
Interest income
$
—

 
$
0.1

 
$
0.1

 
$
0.2

Unrealized (losses) gains on financial derivatives1
(0.9
)
 
0.7

 
(0.5
)
 
1.2

Realized gains on investments
0.3

 
0.1

 
0.8

 
0.1

All other, net
(0.2
)
 
0.2

 
(0.2
)
 
0.3

Other non-operating (expense) income, net
$
(0.8
)
 
$
1.1

 
$
0.2

 
$
1.8

______________________
1 
See “Hedges Relating to the Convertible Notes” in Note 9 for discussion of such instruments.