v3.26.1
Employee benefit plans (Tables)
6 Months Ended
Jun. 30, 2026
Employee benefit plans  
Schedule of components of net periodic benefit cost

Three months ended

Six months ended

June 30, 

June 30, 

  ​ ​ ​

2025

  ​ ​ ​

2026

  ​ ​ ​

2025

  ​ ​ ​

2026

(In millions)

Net periodic pension cost (income):

 

  ​

 

  ​

 

  ​

 

  ​

Service cost

$

1.5

$

1.2

$

2.9

$

2.5

Interest cost

 

5.4

 

5.5

 

10.6

 

11.1

Expected return on plan assets

 

(5.6)

 

(5.3)

 

(10.8)

 

(10.6)

Recognized actuarial losses

 

.6

 

.5

 

1.0

 

.9

Total

$

1.9

$

1.9

$

3.7

$

3.9