v3.26.1
PENSION AND POST-RETIREMENT PLANS (Tables)
3 Months Ended
Mar. 31, 2026
PENSION AND POST-RETIREMENT PLANS  
Schedule of components of net periodic benefit cost and other amounts recognized in Other Comprehensive Income (Loss)

Pension Benefits

Post-retirement Benefits

Three Months Ended March 31, 

Three Months Ended March 31, 

(In millions)

  ​ ​ ​

2026

  ​ ​ ​

2025

  ​ ​ ​

2026

  ​ ​ ​

2025

Components of Net Periodic Benefit Cost (credit):

Service cost

$

1.2

$

1.1

$

0.1

$

Interest cost

 

2.6

 

2.6

 

0.2

 

0.3

Expected return on plan assets

 

(4.4)

 

(4.4)

 

 

Amortization of net actuarial loss (gain)

 

 

 

(0.2)

 

(0.2)

Amortization of prior service credit

 

 

 

(0.5)

 

(0.9)

Net periodic benefit cost (credit)

$

(0.6)

$

(0.7)

$

(0.4)

$

(0.8)