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9. Other Income and Expenses
 9 Months Ended
Sep. 30, 2017
Other Income and Expenses [Abstract]  
Other Income and Other Expense Disclosure 9.    OTHER INCOME AND EXPENSE, NET

Other (income) expense, net includes the following components (in millions):

 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2017
 
2016
 
2017
 
2016
Interest and investment income
$
(1.2
)
 
$
(1.3
)
 
$
(14.3
)
 
$
(13.2
)
Net realized gain on investments
(0.2
)
 
(0.1
)
 
(0.3
)
 
(0.6
)
Other (income) expense, net
$
(1.4
)
 
$
(1.4
)
 
$
(14.6
)
 
$
(13.8
)