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Goodwill and Intangible Assets (Schedule Of Expected Amortization Expense For Intangible Assets) (Details)
$ in Millions
Sep. 30, 2020
USD ($)
Goodwill and Intangible Assets [Abstract]  
2020 (remainder) $ 3
2021 11
2022 8
2023 6
2024 4
Total $ 32