Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions		Jun. 30, 2023	Dec. 31, 2022
Cash and investments segregated and on deposit for regulatory purposes, resale agreements	[1]	$ 5,405	$ 12,159
Amortized cost of available for sale securities	[1]	136,874	160,162
Available for sale securities, assets pledged	[1]	125,769	147,871
Held to maturity securities, assets pledged	[1]	$ 166,328	$ 173,074
Preferred stock, par value (in USD per share)	[1]	$ 0.01	$ 0.01
Preferred stock, aggregate liquidation preference	[1]	$ 9,328	$ 9,850
Treasury stock (in shares)	[1]	253,803,819	221,033,042
Common Stock [Member]
Common stock, shares authorized (in shares)	[1]	3,000,000,000	3,000,000,000
Common stock, par value (in USD per share)	[1]	$ 0.01	$ 0.01
Common stock, shares issued (in shares)		2,023,295,180	2,023,295,180	[1]
Nonvoting Common Stock [Member]
Common stock, shares authorized (in shares)	[1]	300,000,000	300,000,000
Common stock, par value (in USD per share)	[1]	$ 0.01	$ 0.01
Common stock, shares issued (in shares)		50,893,695	50,893,695	[1]
Asset Pledged as Collateral [Member]
Available for sale securities, assets pledged	[1]	$ 28	$ 41
Held to maturity securities, assets pledged	[1]	$ 8,365	$ 4,522

[1] Certain prior year amounts have been reclassified to conform to the current year presentation. See Note 1 for additional information.