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Other, Net (Schedule Of Other Net) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Other Nonoperating Income [Line Items]      
Interest income $ 4.3 $ 4.0 $ 5.5
AFUDC equity 15.1 13.1 9.9
Charitable Contributions (4.4) (11.5) (1.5)
Pension and Other Postretirement Non Service Cost 27.6 35.5 9.3
Sale of emission reduction credits 0.0 0.0 4.6
Miscellaneous (0.4) (0.3) 4.3
Total Other, net 52.2 40.8 32.1
Interest Rate Swap Settled      
Other Nonoperating Income [Line Items]      
Derivative, Gain (Loss) on Derivative, Net $ 10.0 $ 0.0 $ 0.0