Goodwill Mortgage Servicing Rights (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Mortgage servicing rights	$ 3,503		$ 3,503		$ 3,686
Fees from mortgage and other loan servicing	$ 200	$ 100	$ 600	$ 500