Defined benefit pension plans (Tables)

6 Months Ended

Jun. 30, 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				Six months ended
	June 30,				June 30,
	2023		2024		2023		2024
	(In millions)
Service cost	$	1.5	$	1.6	$	3.1	$	3.3
Interest cost		5.5		5.2		11.1		10.6
Expected return on plan assets		(5.2)		(5.6)		(10.4)		(11.2)
Recognized net actuarial losses		1.0		1.0		1.9		1.9
Settlements		6.2		—		6.2		—
Total	$	9.0	$	2.2	$	11.9	$	4.6