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9. Other Income and Expenses (Tables)
 6 Months Ended
Jun. 30, 2015
Other Income and Expenses [Abstract]  
Schedule of other income (expense), net
Other (income) expense, net includes the following components (in millions):

 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2015
 
2014
 
2015
 
2014
Interest and investment income
$
(7.1
)
 
$
(8.5
)
 
$
(8.0
)
 
$
(9.2
)
Net realized gain on investments
—

 
—

 
(0.3
)
 
—

Miscellaneous other expense (income) items, net
—

 
0.1

 
—

 
0.2

Other (income) expense, net
$
(7.1
)
 
$
(8.4
)
 
$
(8.3
)
 
$
(9.0
)