Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
HTM securities, Fair Value	$ 1,495	$ 0
Loans Held for Sale, Fair Value	3,544	4,955
Other Assets, Fair Value Disclosure	3,436	4,891
Short-term borrowings, fair value	1,731	1,115
Other Liabilities, Fair Value Disclosure	$ 586	$ 555
Common stock, par value (in dollars per share)	$ 5	$ 5