Pension And Other Postretirement Benefits (Schedule Of Net Periodic Benefit Costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Total selling, general, and administrative expenses					$ 1,240.5	$ 1,098.9	$ 1,159.9
Settlement charge					30.4	27.7
Total non-operating expenses					59.5	58.5	23.7
Pension Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost					30.2	29.2	25.6
Total selling, general, and administrative expenses					30.2	29.2	25.6
Interest cost					23.9	26.7	30.0
Expected return on plan assets					(30.6)	(32.8)	(34.1)
Net actuarial loss					32.3	30.2	19.1
Settlement charge					30.4	27.7
Total non-operating expenses					56.0	51.8	15.0
Net periodic benefit cost					$ 86.2	$ 81.0	$ 40.6
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.72%	2.72%	2.62%	3.38%			4.31%
Expected return on plan assets					5.00%	5.50%	5.75%
Rate of compensation increase					4.32%	4.24%	4.36%
Postretirement Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost					$ 2.2	$ 2.1	$ 2.0
Total selling, general, and administrative expenses					2.2	2.1	2.0
Interest cost					1.7	2.4	2.9
Net actuarial loss					0.8	0.7	0.3
Total non-operating expenses					2.5	3.1	3.2
Net periodic benefit cost					$ 4.7	$ 5.2	$ 5.2
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate					2.22%	3.19%	4.16%
Healthcare cost trend on covered charges					5.00%	5.00%	5.00%