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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
6 Months Ended
Jun. 30, 2026
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)  
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

11.          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, 2026 consisted of the following:

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Non-

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Accumulated

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Post-

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Qualified

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Other

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Pension

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Retirement

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Pension

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​

​

Comprehensive

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(In millions)

  ​ ​ ​

Benefits

  ​ ​ ​

Benefits

  ​ ​ ​

Benefits

  ​ ​ ​

Other

  ​ ​ ​

Income (Loss)

 

Balance at December 31, 2025

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$

(8.6)

​

$

8.9

​

$

(0.7)

​

$

2.0

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$

1.6

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Amortization of prior service credit

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​

—

​

​

(0.4)

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​

—

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​

—

​

​

(0.4)

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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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Foreign currency exchange

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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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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, 2026

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​

(8.6)

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8.4

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(0.7)

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2.0

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1.1

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Amortization of prior service credit

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​

—

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​

(0.4)

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​

—

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​

—

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​

(0.4)

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Amortization of net actuarial loss

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​

—

​

​

(0.1)

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​

—

​

​

—

​

​

(0.1)

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Foreign currency exchange

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​

—

​

​

—

​

​

—

​

​

(1.9)

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​

(1.9)

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Balance at June 30, 2026

​

$

(8.6)

​

$

7.9

​

$

(0.7)

​

$

0.1

​

$

(1.3)

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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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​

​

​

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​

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​

​

​

​

​

​

Non-

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​

​

Accumulated

​

​

​

​

​

​

Post-

​

Qualified

​

​

​

Other

​

​

​

Pension

​

Retirement

​

Pension

​

​

​

Comprehensive

​

(In millions)

  ​ ​ ​

Benefits

  ​ ​ ​

Benefits

  ​ ​ ​

Benefits

  ​ ​ ​

Other

  ​ ​ ​

Income (Loss)

 

Balance at December 31, 2024

​

$

(14.0)

​

$

8.1

​

$

(0.4)

​

$

(0.2)

​

$

(6.5)

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Amortization of prior service credit

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​

—

​

​

(0.7)

​

​

—

​

​

—

​

​

(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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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

​

​

—

​

​

(0.7)

​

​

—

​

​

—

​

​

(0.7)

​

Amortization of net actuarial gain (loss)

​

​

—

​

​

(0.2)

​

​

—

​

​

—

​

​

(0.2)

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Foreign currency exchange

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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

​

$

(14.0)

​

$

6.4

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$

(0.4)

​

$

1.7

​

$

(6.3)

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