CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
ASSETS:
Securities held-to-maturity, fair value	$ 2,011	$ 2,289
STOCKHOLDERS’ EQUITY:
Preferred stock, par value (in dollars per share)	$ 25.00	$ 25.00
Preferred stock, authorized (in shares)	100,000,000	100,000,000
Preferred stock, issued (in shares)	2,050,000	2,050,000
Preferred stock, outstanding (in shares)	2,050,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, issued (in shares)	572,153,923	571,259,135
Common stock, outstanding (in shares)	423,031,985	422,137,197
Treasury stock (in shares)	149,121,938	149,121,938
Available-for-sale Securities
ASSETS:
Securities, pledged to creditors	$ 865	$ 640
Held-to-maturity Securities
ASSETS:
Securities, pledged to creditors	70	77
Securities held-to-maturity, fair value	$ 2,011	$ 2,289