Defined contribution and defined benefit retirement (Tables)

9 Months Ended

Sep. 30, 2023

Defined Benefit Pension Plans

Defined Benefit Plan Disclosure [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				Nine months ended
	September 30,				September 30,
	2022		2023		2022		2023
	(In millions)
Service cost	$	2.8	$	1.6	$	8.7	$	4.7
Interest cost		3.0		5.5		9.2		16.6
Expected return on plan assets		(3.5)		(5.1)		(10.4)		(15.5)
Recognized net actuarial losses		3.6		1.0		11.1		2.9
Plan settlement		—		—		—		6.2
Total	$	5.9	$	3.0	$	18.6	$	14.9