Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
HTM securities, Fair Value	$ 43,041	$ 44,630
Loans Held for Sale, Fair Value	1,201	852
Loans Receivable, Fair Value Disclosure	14	15
Other Assets, Fair Value Disclosure	1,359	1,311
Interest-Bearing Domestic Deposit, Brokered	23	0
Short-term borrowings, fair value	2,034	1,625
Other Liabilities, Fair Value Disclosure	$ 2,990	$ 2,597
Common stock, par value (in dollars per share)	$ 5	$ 5