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9. Other Income and Expenses (Tables)
 9 Months Ended
Sep. 30, 2019
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,
 
2019
 
2018
 
2019
 
2018
Interest and investment income
$
(4.1
)
 
$
(2.6
)
 
$
(27.4
)
 
$
(20.9
)
Net realized (gain) loss on investments
(0.2
)
 
0.1

 
(0.2
)
 
0.3

Other-than-temporary impairment loss on investment
—

 
—

 
1.6

 
—

Gain on sale of land
—

 
—

 
—

 
(4.1
)
Gain on divestiture of product line
—

 
—

 
—

 
(5.1
)
Other (income) expense
(0.1
)
 
(0.1
)
 
(1.0
)
 
0.2

Other (income) expense, net
$
(4.4
)
 
$
(2.6
)
 
$
(27.0
)
 
$
(29.6
)