Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions		Sep. 30, 2020	Sep. 30, 2019
Reconciliation of cash, cash equivalents and amounts reported within the balance sheet
Cash and cash equivalents	[1]	$ 27,465	$ 20,252
Restricted cash and cash equivalents amounts included in cash and investments segregated and on deposit for regulatory purposes	[1]	10,897	12,032
Total cash and cash equivalents, including amounts restricted shown in the statement of cash flows	[1]	$ 38,362	$ 32,284

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