Long-Term Debt (Schedule Of Subordinated Notes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Subordinated Borrowing [Line Items]
Subordinated notes, Balance	$ 87	$ 247
Long-term Debt, Interest Rate 6.95%	6.95%
Subordinated Notes Interest Rate 6.95 Percent [Member]
Subordinated Borrowing [Line Items]
Subordinated notes, Balance	$ 87
Subordinated Notes Par Amount	$ 88
Subordinated Borrowings, Due Date	46997