Loan Sale and Servicing Activities and Variable Interest Entities (Loan Sale and Servicing Activities and Variable Interest Entities) (Narrative) (Details) - Low Income Housing Tax Credit Investments - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortization	$ 200
Tax credits	200
Amortization, tax credits, and other tax benefits recognized low income housing tax credit investments (less than)		$ 100
Other tax benefits	$ 100