Schedule I (PARENT COMPANY ONLY) - CONDENSED STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2018
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 8,813,564	$ 7,111,929
Cash and securities segregated and on deposit for regulatory purposes with clearing and depository organizations	1,015,107	570,084
Total cash, cash equivalents and restricted cash	9,828,671	7,682,013	$ 6,329,712	$ 5,819,027
Parent company
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	640,426	1,281,786
Cash and securities segregated and on deposit for regulatory purposes with clearing and depository organizations	8,219	21,892
Total cash, cash equivalents and restricted cash	$ 648,645	$ 1,303,678	$ 167,352	$ 979,420