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Long Term Subordinated Notes (Tables)	9 Months Ended
Long Term Subordinated Notes (Tables)	Sep. 30, 2022
Long Term Subordinated Notes [Abstract]
Schedule Of Outstanding Fixed To Floating Rate Long Term Subordinated Notes	September 30, 2022 December 31, 2021 Original Consolidated Consolidated Principal Maturity Date Balance Fair Balance Fair (Dollars in millions) Date Issued Amount Scheduled Final Sheet Amount Value Sheet Amount Value Long term subordinated notes 04/26/2007 $ 400 05/15/2037 05/01/2067 $ 218 $ 179 $ 224 $ 216
Schedule Of Interest Expense Incurred In Connection With Long Term Subordinated Notes	Three Months Ended Nine Months Ended September 30, September 30, (Dollars in millions) 2022 2021 2022 2021 Interest expense incurred $ 3 $ 1 $ 6 $ 4