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Other (Expense) Income, Net
 6 Months Ended
Jun. 30, 2016
Other Income and Expenses [Abstract]  
Other (Expense) Income, Net
Other (Expense) Income, Net
Other (expense) income, net consisted of the following for each period presented (in millions of dollars):
 
Quarter Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2016
 
2015
 
2016
 
2015
Interest income
$
—

 
$
—

 
$
0.1

 
$
0.2

Realized gain on investments
0.3

 
0.2

 
0.3

 
0.5

Loss on extinguishment of debt1
(11.1
)
 
—

 
(11.1
)
 
—

All other, net
0.1

 
0.2

 
0.3

 
0.1

Other (expense) income, net
$
(10.7
)
 
$
0.4

 
$
(10.4
)
 
$
0.8


_____________________
1 
Represents the loss on extinguishment of our 8.25% Senior Notes during the quarter ended June 30, 2016, which includes an $8.2 million premium paid to redeem the notes and a $2.9 million write-off of unamortized debt issuance costs associated with the notes.