Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions		Sep. 30, 2021	Sep. 30, 2020
Reconciliation of cash, cash equivalents and amounts reported within the balance sheet
Cash and cash equivalents	[1]	$ 34,323	$ 27,465
Restricted cash and cash equivalents amounts included in cash and investments segregated and on deposit for regulatory purposes	[1]	25,778	10,897
Total cash and cash equivalents, including amounts restricted shown in the statement of cash flows	[1]	$ 60,101	$ 38,362

[1] For more information on the nature of restrictions on restricted cash and cash equivalents, see Note 17.