Pension Plans (Components of Net Periodic Pension Cost (Benefit)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Retirement Benefits [Abstract]
Defined Benefit Plan, Type [Extensible Enumeration]	us-gaap:PensionPlansDefinedBenefitMember	us-gaap:PensionPlansDefinedBenefitMember	us-gaap:PensionPlansDefinedBenefitMember	us-gaap:PensionPlansDefinedBenefitMember
Interest cost	$ 3.9	$ 3.8	$ 11.5	$ 11.2
Expected return on plan assets	(4.3)	(4.6)	(12.9)	(13.8)
Recognized net actuarial loss	1.3	$ 0.8	3.9	2.4
Net periodic pension cost (benefit)	$ 0.9		$ 2.5	$ (0.2)