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Other Income (Expense), Net (Tables)
 6 Months Ended
Jun. 30, 2020
Other Income And Expenses [Abstract]  
Other Income (Expense), Net

Other income (expense), net, consisted of the following for the periods presented (in millions of dollars):

 

 

 

Quarter Ended

June 30,

 

 

Six Months Ended

June 30,

 

 

 

2020

 

 

2019

 

 

2020

 

 

2019

 

Interest income

 

$

0.2

 

 

$

0.1

 

 

$

0.3

 

 

$

0.3

 

Net periodic postretirement benefit cost relating to Salaried VEBA

 

 

(1.2

)

 

 

(1.6

)

 

 

(2.4

)

 

 

(3.3

)

Realized gain on available for sale securities

 

 

0.6

 

 

 

1.2

 

 

 

2.1

 

 

 

2.4

 

Unrealized gain on equity securities

 

 

0.7

 

 

 

—

 

 

 

0.1

 

 

 

0.5

 

All other income (expense), net

 

 

0.2

 

 

 

0.2

 

 

 

(0.4

)

 

 

0.5

 

Other income (expense), net

 

$

0.5

 

 

$

(0.1

)

 

$

(0.3

)

 

$

0.4