Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions		Mar. 31, 2019	Mar. 31, 2018
Reconciliation of cash, cash equivalents and amounts reported within the balance sheet
Cash and cash equivalents	[1],[2]	$ 32,558	$ 14,145
Restricted cash and cash equivalents amounts included in cash and investments segregated and on deposit for regulatory purposes	[1],[2]	9,130	3,480
Total cash and cash equivalents, including amounts restricted shown in the statement of cash flows	[1],[2]	$ 41,688	$ 17,625

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

[2] Reconciliation of cash, cash equivalents and amounts reported within the balance sheet