Accumulated Other Comprehensive Loss (Reclassification Out Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Non-operating expenses	$ 59.5	$ 58.5	$ 23.7
Tax benefit	87.9	44.2	55.0
Total reclassifications for the period, net of tax	(263.0)	(122.1)	$ (144.9)
Non-cash pension settlement charge	30.4	27.7
Reclassification out of AOCI | Actuarial Losses Recognized
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Non-operating expenses	63.5	58.6
Tax benefit	(16.3)	(15.1)
Total reclassifications for the period, net of tax	$ 47.2	$ 43.5