Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019
Cash Flows from Operating Activities
Net income		$ 1,466	$ 1,901
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Share-based compensation		91	95
Depreciation and amortization		205	167
Premium amortization, net, on available for sale and held to maturity securities		511	159
Other		166	65
Net change in:
Investments segregated and on deposit for regulatory purposes		(16,198)	(889)
Receivables from brokerage clients		418	219
Other assets		(109)	15
Payables to brokerage clients		6,443	(1,713)
Accrued expenses and other liabilities		682	(400)
Net cash provided by (used for) operating activities		(6,325)	(381)
Cash Flows from Investing Activities
Purchases of available for sale securities		(101,667)	(5,767)
Proceeds from sales of available for sale securities		70	16,274
Principal payments on available for sale securities		24,677	12,306
Purchases of held to maturity securities		0	(10,469)
Principal payments on held to maturity securities		0	8,466
Net change in bank loans		(2,663)	(59)
Cash acquired in acquisition, net of cash paid		2,768	0
Purchases of equipment, office facilities, and property		(335)	(310)
Purchases of Federal Home Loan Bank stock		(12)	(2)
Purchases of Federal Reserve stock		(182)	0
Other investing activities		(101)	9
Net cash provided by (used for) investing activities		(77,445)	20,448
Cash Flows from Financing Activities
Net change in bank deposits		81,472	(23,048)
Issuance of long-term debt		1,089	593
Net proceeds from preferred stock offerings		2,470	0
Dividends paid		(547)	(537)
Proceeds from stock options exercised		29	48
Repurchases of common stock		0	(1,155)
Other financing activities		(7)	(13)
Net cash provided by (used for) financing activities		84,506	(24,112)
Increase (Decrease) in Cash and Cash Equivalents, including Amounts Restricted		736	(4,045)
Cash and Cash Equivalents, including Amounts Restricted at Beginning of Period		45,577	38,227
Cash and Cash Equivalents, including Amounts Restricted at End of Period	[1]	46,313	34,182
Non-cash investing activity:
Securities transferred from held to maturity to available for sale, at fair value		136,099	8,771
Securities purchased during the period but settled after period end		1,417	2,910
Additions of equipment, office facilities, and property		84	44
Non-cash financing activity:
Extinguishment of finance lease obligation through an assignment agreement		0	52
Common stock repurchased during the period but settled after period end		0	65
Cash paid during the period for:
Interest		227	625
Income taxes		41	641
Amounts included in the measurement of lease liabilities		75	65
Leased assets obtained in exchange for new operating lease liabilities		$ 58	$ 65

[1] For more information on the nature of restrictions on restricted cash and cash equivalents, see Note 15.