Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

Schedule Of Defined Benefit Plans Disclosures

For the three month periods ended March 31, 2023 and 2022, the components of pension and other postretirement benefit expense for the Company’s defined benefit plans included the following (in millions): 

	Pension Benefits				Other Postretirement Benefits
	Three months ended March 31,				Three months ended March 31,
	2023		2022		2023		2022
Service cost - benefits earned during the year	$	1.6	$	3.2	$	0.2	$	0.2
Interest cost on benefits earned in prior years	24.0		17.8		2.7		2.0
Expected return on plan assets	(25.7)		(33.1)		—		—
Amortization of prior service cost (credit)	0.1		0.1		(0.2)		(0.3)
Amortization of net actuarial loss	14.4		16.0		1.5		3.3
Total retirement benefit expense	$	14.4	$	4.0	$	4.2	$	5.2