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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
6 Months Ended
Jun. 30, 2025
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)  
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

10.          ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

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Changes in accumulated other comprehensive income (loss) by component, net of tax, for the six months ended June 30, 2025 consisted of the following:

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Accumulated

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Post-

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Non-

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Other

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Pension

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Retirement

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Qualified

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Comprehensive

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(In millions)

    

Benefits

    

Benefits

    

Plans

    

Other

    

Income (Loss)

 

Balance at December 31, 2024

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$

(14.0)

​

$

8.1

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$

(0.4)

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$

(0.2)

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$

(6.5)

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Amortization of prior service credit

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—

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(0.7)

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​

—

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​

—

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​

(0.7)

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Amortization of net actuarial loss

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​

—

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​

(0.1)

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—

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​

—

​

​

(0.1)

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Foreign currency exchange

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​

—

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—

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—

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0.3

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0.3

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Other adjustments

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—

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—

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—

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0.2

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​

0.2

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Balance at March 31, 2025

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​

(14.0)

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​

7.3

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​

(0.4)

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0.3

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(6.8)

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Amortization of prior service credit

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​

—

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(0.7)

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—

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​

—

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​

(0.7)

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Amortization of net actuarial loss

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​

—

​

​

(0.2)

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—

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—

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​

(0.2)

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Foreign currency exchange

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​

—

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—

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​

—

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1.4

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1.4

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Balance at June 30, 2025

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$

(14.0)

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$

6.4

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$

(0.4)

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$

1.7

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$

(6.3)

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Changes in accumulated other comprehensive income (loss) by component, net of tax, for the six months ended June 30, 2024 consisted of the following:

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​

​

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​

​

​

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Accumulated

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​

​

​

Post-

​

Non-

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​

​

Other

​

​

​

Pension

​

Retirement

​

Qualified

​

​

​

Comprehensive

​

(In millions)

    

Benefits

    

Benefits

    

Plans

    

Other

    

Income (Loss)

 

Balance at December 31, 2023

​

$

(20.3)

​

$

11.0

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$

(0.2)

​

$

1.3

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$

(8.2)

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Amortization of prior service credit

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​

—

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​

(0.7)

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​

—

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​

—

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​

(0.7)

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Amortization of net actuarial gain (loss)

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​

0.1

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​

(0.2)

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—

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—

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​

(0.1)

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Foreign currency exchange

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—

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​

—

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—

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​

(0.9)

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​

(0.9)

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Other adjustments

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—

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—

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—

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0.1

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0.1

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Balance at March 31, 2024

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(20.2)

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10.1

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(0.2)

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0.5

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(9.8)

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Amortization of prior service cost

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​

—

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​

(0.7)

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—

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​

—

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​

(0.7)

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Amortization of net actuarial gain (loss)

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​

0.1

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​

(0.1)

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​

—

​

​

—

​

​

—

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Foreign currency exchange

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​

—

​

​

—

​

​

—

​

​

0.3

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​

0.3

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Balance at June 30, 2024

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$

(20.1)

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$

9.3

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$

(0.2)

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$

0.8

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$

(10.2)

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