v3.26.1
Defined benefit pension plans (Tables)
6 Months Ended
Jun. 30, 2026
Defined Benefit Pension Plans  
Defined benefit pension plans  
Schedule of Components of Net Periodic Defined Benefit Cost

Three months ended

Six months ended

June 30, 

June 30, 

  ​ ​ ​

2025

  ​ ​ ​

2026

  ​ ​ ​

2025

  ​ ​ ​

2026

(In millions)

Service cost

$

1.5

$

1.2

$

2.9

$

2.5

Interest cost

5.8

5.5

11.3

11.1

Expected return on plan assets

 

(5.9)

 

(5.3)

 

(11.4)

 

(10.6)

Recognized net actuarial losses

 

.9

 

.5

 

1.6

 

.9

Total

$

2.3

$

1.9

$

4.4

$

3.9