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Pension And Other Postretirement Benefits (Schedule Of Expected Benefit Payments) (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Pension Benefits  
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2020 $ 62.0
2021 58.3
2022 58.2
2023 59.2
2024 59.1
2025 to 2029 296.8
Postretirement Benefits  
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2020 6.9
2021 7.5
2022 7.7
2023 7.5
2024 7.3
2025 to 2029 $ 33.0