CONDENSED FINANCIAL INFORMATION (PARENT COMPANY ONLY), Condensed Statement of Income (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Interest income	$ 1,000	$ 1,281	$ 1,044
Other	21	64	65
Total revenues	8,168	8,023	7,476
Interest expense	(178)	(283)	(202)
Net revenues	7,990	7,740	7,274
Non-interest expenses:
Compensation and benefits	5,465	5,087	4,795
Non-compensation expenses:
Communications and information processing	393	373	352
Occupancy and equipment	225	218	202
Business development	134	194	181
Other	243	277	243
Total non-compensation expenses	1,473	1,278	1,168
Provision for income taxes	234	341	454
Net income	818	1,034	857
RJF Parent Company
Revenues:
Dividends from non-bank subsidiaries	634	632	225
Dividends from bank subsidiary	130	190	130
Interest from subsidiaries	18	31	25
Interest income	3	7	4
Other	23	20	20
Total revenues	808	880	404
Interest expense	(87)	(75)	(74)
Net revenues	721	805	330
Non-interest expenses:
Compensation and benefits	63	73	68
Non-compensation expenses:
Communications and information processing	6	8	9
Occupancy and equipment	1	1	1
Business development	18	20	20
Other	23	16	17
Intercompany allocations and charges	(16)	(24)	(32)
Total non-compensation expenses	32	21	15
Total non-interest expenses	95	94	83
Pre-tax income before equity in undistributed net income of subsidiaries	626	711	247
Provision for income taxes	(58)	(31)	(12)
Income before equity in undistributed net income of subsidiaries	684	742	259
Equity in undistributed net income of subsidiaries	134	292	598
Net income	$ 818	$ 1,034	$ 857