Pension Plans (Components of Net Periodic Pension Cost (Benefit)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 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	$ 3.8	$ 3.7	$ 7.6	$ 7.4
Expected return on plan assets	(4.3)	(4.6)	(8.6)	(9.2)
Recognized net actuarial loss	1.3	0.8	2.6	1.6
Net periodic pension cost (benefit)	$ 0.8	$ (0.1)	$ 1.6	$ (0.2)