Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Cash Flows from Operating Activities
Net income	[1]	$ 3,299		$ 3,704		$ 3,507
Adjustments to reconcile net income to net cash (used for) provided by operating activities:
Share-based compensation	[2]	204		183		197
Depreciation and amortization	[2]	414		322		277
Amortization of acquired intangible assets	[1]	190		27		29
Provision (benefit) for deferred income taxes	[2]	(138)		2		49
Premium amortization, net, on available for sale and held to maturity securities	[2]	1,586		446		350
Other	[2]	349		199		137
Net change in:
Investments segregated and on deposit for regulatory purposes	[2]	(10,208)		(977)		6,922
Receivables from brokerage clients	[2]	(14,609)		(125)		(1,100)
Other assets	[2]	4		(709)		(8)
Payables to brokerage clients	[2]	22,909		6,494		1,483
Accrued expenses and other liabilities	[2]	2,852		(241)		613
Net cash provided by (used for) operating activities	[2]	6,852		9,325		12,456
Cash Flows from Investing Activities
Purchases of available for sale securities	[2]	(202,171)		(31,815)		(32,801)
Proceeds from sales of available for sale securities	[2]	4,801		24,495		115
Principal payments on available for sale securities	[2]	63,247		21,616		16,016
Purchases of held to maturity securities	[2]	0		(19,441)		(40,873)
Principal payments on held to maturity securities	[2]	0		19,606		17,410
Net change in bank loans	[2]	(5,675)		(1,730)		(129)
Cash acquired in acquisitions, net of cash paid	[2]	14,748		0		0
Purchases of equipment, office facilities, and property	[2]	(631)		(708)		(570)
Purchases of Federal Home Loan Bank stock	[2]	(26)		(27)		(156)
Proceeds from sales of Federal Home Loan Bank stock	[2]	32		24		529
Purchases of Federal Reserve stock	[2]	(191)		0		0
Other investing activities	[2]	15		(56)		(96)
Net cash provided by (used for) investing activities	[2]	(125,851)		11,964		(40,555)
Cash Flows from Financing Activities
Net change in bank deposits	[2]	137,928		(11,329)		61,767
Net change in short-term borrowings	[2]	0		0		(15,000)
Issuance of long-term debt	[2]	3,070		593		3,024
Repayment of long-term debt	[2]	(700)		0		(909)
Repurchases of common stock	[2]	0		(2,220)		(1,000)
Net proceeds from preferred stock offerings	[2]	4,940		0		0
Dividends paid	[2]	(1,280)		(1,060)		(787)
Proceeds from stock options exercised	[2]	79		118		125
Other financing activities	[2]	(55)		(41)		(54)
Net cash provided by (used for) financing activities	[2]	143,982		(13,939)		47,166
Increase (Decrease) in Cash and Cash Equivalents, including Amounts Restricted	[2]	24,983		7,350		19,067
Cash and Cash Equivalents, including Amounts Restricted at Beginning of Year	[2]	45,577	[3]	38,227	[3]	19,160
Cash and Cash Equivalents, including Amounts Restricted at End of Year	[2],[3]	70,560		45,577		38,227
Non-cash investing activity:
Securities transferred from held to maturity to available for sale, at fair value		136,099		8,771		0
Additions of equipment, office facilities, and property		110		45		6
Acquisition of TD Ameritrade		21,758		0		0
Non-cash financing activity:
Extinguishment of finance lease obligation through an assignment agreement		0		52		0
Cash paid during the period for:
Interest		434		1,075		798
Income taxes		803		1,199		$ 927
Amounts included in the measurement of lease liabilities		163		133
Leased assets obtained in exchange for new operating lease liabilities		$ 160		$ 97

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

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

[3] For more information on the nature of restrictions on restricted cash and cash equivalents, see Note 23.