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PENSION AND POST-RETIREMENT PLANS (Tables)
6 Months Ended
Jun. 30, 2025
PENSION AND POST-RETIREMENT PLANS  
Schedule of components of net periodic benefit cost and other amounts recognized in Other Comprehensive Income (Loss)

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Pension Benefits

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Post-retirement Benefits

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Three Months Ended June 30, 

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Three Months Ended June 30, 

(In millions)

    

2025

    

2024

    

2025

    

2024

Components of net periodic benefit cost (credit):

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Service cost

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$

1.1

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$

0.8

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$

0.1

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$

0.1

Interest cost

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2.6

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2.5

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0.2

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0.2

Expected return on plan assets

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(4.4)

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(3.8)

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—

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—

Amortization of net actuarial loss (gain)

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—

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0.1

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(0.1)

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(0.2)

Amortization of prior service credit

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—

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—

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(1.0)

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(0.9)

Net periodic benefit credit

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$

(0.7)

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$

(0.4)

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$

(0.8)

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$

(0.8)

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Pension Benefits

​

Post-retirement Benefits

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Six Months Ended June 30, 

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Six Months Ended June 30, 

(In millions)

    

2025

    

2024

    

2025

    

2024

Components of net periodic benefit cost (credit):

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Service cost

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$

2.2

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$

1.7

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$

0.1

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$

0.2

Interest cost

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5.2

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4.9

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0.5

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0.5

Expected return on plan assets

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(8.8)

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(7.6)

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—

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—

Amortization of net loss (gain)

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—

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0.2

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(0.3)

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(0.4)

Amortization of prior service credit

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—

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—

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(1.9)

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(1.8)

Net periodic benefit credit

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$

(1.4)

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$

(0.8)

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$

(1.6)

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$

(1.5)

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