CONDENSED FINANCIAL INFORMATION (PARENT COMPANY ONLY), Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents segregated for regulatory purposes and restricted cash	$ 9,248	$ 4,244	$ 2,014
Charles Stanley
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents segregated for regulatory purposes and restricted cash	400
Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net assets available for distribution to Parent	210
Net assets restricted from being transferred to Parent	4,300
RJF Parent Company
Condensed Financial Statements, Captions [Line Items]
Unrestricted cash and cash equivalents available to Parent	1,160	2,160
RJF parent cash deposited with RJ Bank	229	185
RJF parent cash deposited with RJ bank, unrestricted	152	108
Cash and cash equivalents segregated for regulatory purposes and restricted cash	$ 477	$ 77	$ 56
Raymond James and Associates Inc
Condensed Financial Statements, Captions [Line Items]
Ratio of net capital to aggregate debit balances required by loan covenants	10.00%