REGULATORY CAPITAL REQUIREMENTS (Details) - USD ($) $ in Millions	Dec. 31, 2020	Sep. 30, 2020
Raymond James Financial Inc
Common Equity Tier 1 Capital (to Risk-Weighted Assets)
Actual, amount	$ 6,538	$ 6,490
Actual, ratio	23.40%	24.20%
Requirement for capital adequacy purposes, amount	$ 1,255	$ 1,208
Requirement for capital adequacy purposes, ratio (in hundredths)	4.50%	4.50%
To be well capitalized under regulatory provisions, amount	$ 1,813	$ 1,744
To be well capitalized under regulatory provisions, ratio (in hundredths)	6.50%	6.50%
Tier 1 Capital (to Risk-Weighted Assets)
Actual, amount	$ 6,538	$ 6,490
Actual, ratio	0.234	0.242
Requirement for capital adequacy purposes, amount	$ 1,674	$ 1,610
Requirement for capital adequacy purposes, ratio (in hundredths)	0.060	0.060
To be well capitalized under regulatory provisions, amount	$ 2,232	$ 2,147
To be well capitalized under regulatory provisions, ratio (in hundredths)	0.080	0.080
Total Capital (to Risk-Weighted Assets)
Actual, amount	$ 6,860	$ 6,804
Actual, ratio	0.246	0.254
Requirement for capital adequacy purposes, amount	$ 2,232	$ 2,147
Requirement for capital adequacy purposes, ratio (in hundredths)	0.080	0.080
To be well capitalized under regulatory provisions, amount	$ 2,790	$ 2,684
To be well capitalized under regulatory provisions, ratio (in hundredths)	0.100	0.100
Tier 1 leverage
Actual, amount	$ 6,538	$ 6,490
Actual, ratio	0.129	0.142
Requirement for capital adequacy purposes, amount	$ 2,028	$ 1,824
Requirement for capital adequacy purposes, ratio (in hundredths)	0.040	0.040
To be well capitalized under regulatory provisions, amount	$ 2,535	$ 2,280
To be well capitalized under regulatory provisions, ratio (in hundredths)	0.050	0.050
RJ Bank
Common Equity Tier 1 Capital (to Risk-Weighted Assets)
Actual, amount	$ 2,340	$ 2,279
Actual, ratio	13.10%	13.00%
Requirement for capital adequacy purposes, amount	$ 803	$ 788
Requirement for capital adequacy purposes, ratio (in hundredths)	4.50%	4.50%
To be well capitalized under regulatory provisions, amount	$ 1,160	$ 1,138
To be well capitalized under regulatory provisions, ratio (in hundredths)	6.50%	6.50%
Tier 1 Capital (to Risk-Weighted Assets)
Actual, amount	$ 2,340	$ 2,279
Actual, ratio	0.131	0.130
Requirement for capital adequacy purposes, amount	$ 1,071	$ 1,051
Requirement for capital adequacy purposes, ratio (in hundredths)	0.060	0.060
To be well capitalized under regulatory provisions, amount	$ 1,428	$ 1,401
To be well capitalized under regulatory provisions, ratio (in hundredths)	0.080	0.080
Total Capital (to Risk-Weighted Assets)
Actual, amount	$ 2,565	$ 2,500
Actual, ratio	0.144	0.143
Requirement for capital adequacy purposes, amount	$ 1,428	$ 1,401
Requirement for capital adequacy purposes, ratio (in hundredths)	0.080	0.080
To be well capitalized under regulatory provisions, amount	$ 1,784	$ 1,751
To be well capitalized under regulatory provisions, ratio (in hundredths)	0.100	0.100
Tier 1 leverage
Actual, amount	$ 2,340	$ 2,279
Actual, ratio	0.075	0.077
Requirement for capital adequacy purposes, amount	$ 1,251	$ 1,183
Requirement for capital adequacy purposes, ratio (in hundredths)	0.040	0.040
To be well capitalized under regulatory provisions, amount	$ 1,563	$ 1,479
To be well capitalized under regulatory provisions, ratio (in hundredths)	0.050	0.050
Raymond James & Associates Inc
Alternative Method Elected [Abstract]
Net capital as a percent of aggregate debit items (in hundredths)	59.90%	48.00%
Net capital	$ 1,498	$ 1,245
Less: required net capital	(50)	(52)
Excess net capital	$ 1,448	$ 1,193