CONDENSED FINANCIAL INFORMATION (PARENT COMPANY ONLY), Condensed Statement of Income (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Revenues:
Interest income	$ 3,748	$ 1,508	$ 823
All other	78	61	124
Total revenues	12,992	11,308	9,910
Interest expense	(1,373)	(305)	(150)
Net revenues	11,619	11,003	9,760
Non-interest expenses:
Compensation, commissions and benefits	7,299	7,329	6,584
Non-compensation expenses:
Communications and information processing	599	506	429
Occupancy and equipment	271	252	232
Business development	242	186	111
Losses on extinguishment of debt	0	0	98
Professional fees	145	131	122
Other	500	325	295
Total non-compensation expenses	2,040	1,652	1,385
Income tax benefit	541	513	388
Net income	1,739	1,509	1,403
Preferred stock dividends	6	4	0
Net income available to common shareholders, basic	1,733	1,505	1,403
Net income available to common shareholders, diluted	1,733	1,505	1,403
RJF Parent Company
Revenues:
Dividends from non-bank subsidiaries	874	2,002	257
Dividends from bank subsidiaries	375	60	0
Interest from subsidiaries	84	23	9
Interest income	20	3	1
All other	18	17	21
Total revenues	1,371	2,105	288
Interest expense	(93)	(93)	(97)
Net revenues	1,278	2,012	191
Non-interest expenses:
Compensation, commissions and benefits	86	98	81
Non-compensation expenses:
Communications and information processing	9	6	5
Occupancy and equipment	1	1	1
Business development	21	20	19
Losses on extinguishment of debt	0	0	98
Intercompany allocations and charges	2	(8)	(14)
Professional fees	7	17	14
Other	3	47	16
Total non-compensation expenses	43	83	139
Total non-interest expenses	129	181	220
Pre-tax income/(loss) before equity in undistributed net income of subsidiaries	1,149	1,831	(29)
Income tax benefit	(35)	(20)	(99)
Income before equity in undistributed net income of subsidiaries	1,184	1,851	70
Equity in undistributed net income of subsidiaries	555	(342)	1,333
Net income	1,739	1,509	1,403
Preferred stock dividends	6	4	0
Net income available to common shareholders, basic	$ 1,733	$ 1,505	$ 1,403