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9. Other Income and Expenses (Tables)
 9 Months Ended
Sep. 30, 2016
Other Income and Expenses [Abstract]  
Schedule of other income (expense), net Other (income) expense, net includes the following components (in millions):

 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2016
 
2015
 
2016
 
2015
Interest and investment income
$
(1.3
)
 
$
(0.7
)
 
$
(13.2
)
 
$
(8.7
)
Net realized gain on investments
(0.1
)
 
—

 
(0.6
)
 
(0.3
)
Other (income) expense, net
$
(1.4
)
 
$
(0.7
)
 
$
(13.8
)
 
$
(9.0
)