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PENSION AND POST-RETIREMENT PLANS (Tables)
9 Months Ended
Sep. 30, 2022
PENSION AND POST-RETIREMENT PLANS  
Components of net periodic benefit cost (benefit)

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Pension Benefits

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Post-retirement Benefits

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Three Months Ended September 30, 

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Three Months Ended September 30, 

(In millions)

    

2022

    

2021

    

2022

    

2021

Components of net periodic benefit cost (benefit):

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Service cost

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$

1.2

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$

1.3

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$

0.2

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$

0.2

Interest cost

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1.9

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1.4

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0.3

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0.1

Expected return on plan assets

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(4.0)

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(3.5)

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—

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—

Amortization of net loss

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0.1

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1.3

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0.2

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0.1

Amortization of prior service credit

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(0.3)

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(0.6)

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(1.0)

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(0.9)

Net periodic benefit cost (benefit)

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$

(1.1)

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$

(0.1)

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$

(0.3)

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$

(0.5)

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​

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​

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Pension Benefits

​

Post-retirement Benefits

​

​

Nine Months Ended September 30, 

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Nine Months Ended September 30, 

(In millions)

    

2022

    

2021

    

2022

    

2021

Components of net periodic benefit cost (benefit):

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​

​

​

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​

​

​

​

​

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Service cost

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$

3.6

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$

3.6

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$

0.5

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$

0.5

Interest cost

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5.2

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4.6

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0.7

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0.5

Expected return on plan assets

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(11.9)

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(10.8)

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—

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—

Amortization of net loss

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1.8

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3.8

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0.6

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0.7

Amortization of prior service credit

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(0.8)

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(1.7)

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(2.8)

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(2.7)

Net periodic benefit cost (benefit)

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$

(2.1)

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$

(0.5)

​

$

(1.0)

​

$

(1.0)