Loan Sale and Servicing Activities and Variable Interest Entities (Loan Sale and Servicing Activities and Variable Interest Entities) (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Low Income Housing Tax Credit Investments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortization		$ 300
Tax credits		300
Other tax benefits		$ 100
Low Income Housing Tax Credit And Market Tax Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortization	$ 300
Tax credits	300
Other tax benefits	$ 100