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Income Taxes (Schedule Of Components Of Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current
Federal	$ (0.1)	$ 0.2	$ 0.0
State	6.0	11.7	5.2
Total Current	5.9	11.9	5.2
Deferred
Federal	99.2	(0.4)	110.7
State	13.8	(27.4)	9.0
Total Deferred	113.0	(27.8)	119.7
Deferred Investment Credits	(1.1)	(1.2)	(1.4)
Income Taxes	$ 117.8	$ (17.1)	$ 123.5

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