CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Securities available for sale, amortized cost	$ 89,933	$ 94,871
Securities available for sale, allowance for credit loss	(3)	(1)
Loans Held-for-sale, Fair Value Disclosure	$ 767	$ 1,000
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	688,277,408	685,057,944
Common stock, shares outstanding	383,817,721	413,858,537
Treasury stock, par value (in dollars per share)	$ 0.01	$ 0.01
Treasury stock, shares	304,459,687	271,199,407