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Other, Net (Schedule Of Other Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Nonoperating Income (Expense) [Abstract]
Interest income	$ 4.0	$ 5.5	$ 7.7
AFUDC equity	13.1	9.9	8.0
Charitable Contributions	(11.5)	(1.5)	(5.1)
Pension and Other Postretirement Non Service Cost	35.5	9.3	(16.5)
Sale of emission reduction credits	0.0	4.6	0.0
Miscellaneous	(0.3)	4.3	0.7
Total Other, net	$ 40.8	$ 32.1	$ (5.2)