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Other Income, Net (Tables)
 12 Months Ended
Dec. 31, 2024
Other Income and Expenses [Abstract]  
Other Income, Net

The following table presents the components of Other income, net, (in millions of dollars):

 

 

 

Year Ended December 31,

 

 

 

2024

 

 

2023

 

 

2022

 

Interest income

 

$

3.6

 

 

$

1.7

 

 

$

1.3

 

Net periodic postretirement and postemployment benefit cost

 

 

(4.3

)

 

 

(8.4

)

 

 

(5.6

)

Unrealized gain (loss) on equity securities

 

 

0.3

 

 

 

0.6

 

 

 

(1.2

)

Gain on disposition of property, plant and equipment

 

 

3.8

 

 

 

13.8

 

 

 

6.0

 

Gain on business interruption insurance recoveries1

 

 

16.3

 

 

 

—

 

 

 

—

 

Post-acquisition funding received from Alcoa Corporation2

 

 

—

 

 

 

—

 

 

 

6.0

 

All other, net

 

 

(0.2

)

 

 

(0.3

)

 

 

(0.1

)

Other income, net

 

$

19.5

 

 

$

7.4

 

 

$

6.4

 

 

1.
Represents advances against business interruption insurance claims. We recognize such advances in the period in which the insurance proceeds are received or become realizable. As of December 31, 2024 we received net cash proceeds of $15.9 million.
2.
Represents reimbursement received for repairs and maintenance expenditures on certain machinery and equipment that we had purchased from Alcoa in connection with our March 31, 2021 acquisition of Warrick.