Pension And Other Postretirement Benefits (Schedule Of Net Periodic Benefit Costs) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Total selling, general, and administrative expenses	$ 290.1	$ 273.5
Total non-operating expenses	7.5	6.6
Pension Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	7.2	6.5
Total selling, general, and administrative expenses	7.2	6.5
Interest cost	7.0	7.6
Expected return on plan assets	(8.4)	(8.6)
Net actuarial loss	7.2	4.9
Total non-operating expenses	5.8	3.9
Net periodic benefit cost	13.0	10.4
Postretirement Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	0.5	0.5
Total selling, general, and administrative expenses	0.5	0.5
Interest cost	0.6	0.8
Expected return on plan assets	0.0	0.0
Net actuarial loss	0.2	0.1
Total non-operating expenses	0.8	0.9
Net periodic benefit cost	$ 1.3	$ 1.4