Shareholders' Equity (Reclassification out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (10.5)	$ (8.8)	$ (30.6)	$ (26.7)
Tax impact	(26.9)	(24.2)	(68.4)	(60.6)
Total (income), net of tax	(76.9)	(69.5)	(202.7)	(177.0)
Reclassification From Accumulated Other Comprehensive Loss [Member] | Derivative (Loss) Gain [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Tax impact	0.4	0.0	0.8	0.1
Total (income), net of tax	(1.0)	(2.6)	(3.6)	(6.8)
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	(1.4)	(3.3)	(4.7)	(8.6)
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	(0.1)	(0.1)	(0.2)	(0.2)
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	(0.9)	0.0	(2.5)	(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	0.4	0.7	1.1	1.8
Total loss, before tax	(1.0)	(0.1)	(2.7)	(0.4)
Total loss, net of tax	(0.6)	(0.1)	(1.9)	(0.3)
Total reclassifications for the period	$ (1.6)	$ (2.7)	$ (5.5)	$ (7.1)