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Defined benefit pension plans (Tables)
3 Months Ended
Mar. 31, 2024
Defined Benefit Pension Plans  
Defined benefit pension plans [Line Items]  
Components of Net Periodic Defined Benefit Cost

The components of our net periodic defined benefit pension cost are presented in the table below.

Three months ended

March 31, 

    

2023

    

2024

(In millions)

Service cost

$

1.6

$

1.7

Interest cost

5.6

5.4

Expected return on plan assets

 

(5.2)

 

(5.6)

Recognized net actuarial losses

 

.9

 

.9

Total

$

2.9

$

2.4