CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Securities available for sale, amortized cost	$ 87,650	$ 87,047
Allowance for Credit Losses	(4)	(3)
Loans Held-for-sale, Fair Value Disclosure	$ 314	$ 191
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	4,975,000	4,975,000
Preferred stock, shares outstanding	4,975,000	4,975,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	695,336,698	690,334,422
Common stock, shares outstanding	380,991,150	381,318,702
Treasury stock, par value (in dollars per share)	$ 0.01	$ 0.01
Treasury stock, shares	314,345,548	309,015,720
Total assets	$ 471,435	$ 455,249
Stockholders' Equity Attributable to Parent	$ 53,668	$ 52,582