CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
ASSETS:
Securities held-to-maturity, fair value		$ 3,242	$ 4,041
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)		1,600,000	850,000
Preferred stock, outstanding (in shares)		1,600,000	850,000
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)		568,238,730	566,819,863
Common stock, outstanding (in shares)		433,121,083	466,007,984
Treasury stock (in shares)		135,117,647	100,811,879
Available-for-sale Securities
ASSETS:
Securities, pledged to creditors	[1]	$ 359	$ 363
Held-to-maturity Securities
ASSETS:
Securities, pledged to creditors	[1]	249	0
Securities held-to-maturity, fair value	[1]	$ 3,242	$ 4,041

[1] Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.