Shareholders' Equity (Reclassification out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (11.1)	$ (9.2)	$ (20.1)	$ (17.9)
Tax impact	(21.2)	(19.8)	(41.5)	(36.4)
Total (income), net of tax	(65.9)	(60.2)	(125.8)	(107.5)
Reclassification From Accumulated Other Comprehensive Loss [Member] | Derivative (Loss) Gain [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Tax impact	0.1	0.1	0.4	0.1
Total (income), net of tax	(0.9)	(2.3)	(2.6)	(4.2)
Reclassification From Accumulated Other Comprehensive Loss [Member] | Derivative (Loss) Gain [Member] | Interest Rate Swap Contracts, Before Tax [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(1.2)	(2.9)	(3.3)	(5.3)
Reclassification From Accumulated Other Comprehensive Loss [Member] | Prior Service Credit Amortization [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Other non-operating (income), net	0.0	(0.1)	(0.1)	(0.1)
Reclassification From Accumulated Other Comprehensive Loss [Member] | Amortization of Net Actuarial Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Other non-operating (income), net	(0.8)	0.0	(1.6)	(0.2)
Reclassification From Accumulated Other Comprehensive Loss [Member] | Pension And Postretirement Adjustments [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Tax impact	0.3	0.6	0.7	1.1
Total loss, before tax	(0.8)	(0.1)	(1.7)	(0.3)
Total loss, net of tax	(0.7)	0.0	(1.3)	(0.2)
Total reclassifications for the period	$ (1.6)	$ (2.3)	$ (3.9)	$ (4.4)