Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2022

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost

	Three months ended				Nine months ended
	September 30,				September 30,
	2021		2022		2021		2022
	(In millions)
Net periodic pension cost (income):
Service cost	$	3.7	$	2.8	$	11.1	$	8.7
Interest cost		2.2		2.7		6.6		8.3
Expected return on plan assets		(2.9)		(3.1)		(8.9)		(9.2)
Amortization of prior service cost		-		-		.1		-
Recognized actuarial losses		5.0		3.2		15.2		10.0
Total	$	8.0	$	5.6	$	24.1	$	17.8