REGULATORY CAPITAL REQUIREMENTS (Details) - USD ($) $ in Millions	Mar. 31, 2020	Sep. 30, 2019
Raymond James Financial Inc
Common Equity Tier 1 Capital (to Risk-Weighted Assets)
Actual, amount	$ 6,183	$ 5,971
Actual, ratio (in hundredths)	24.10%	24.80%
Requirement for capital adequacy purposes, amount	$ 1,156	$ 1,085
Requirement for capital adequacy purposes, ratio (in hundredths)	4.50%	4.50%
To be well capitalized under regulatory provisions, amount	$ 1,669	$ 1,567
To be well capitalized under regulatory provisions, ratio (in hundredths)	6.50%	6.50%
Tier 1 Capital (to Risk-Weighted Assets)
Actual, amount	$ 6,183	$ 5,971
Actual, ratio (in hundredths)	24.10%	24.80%
Requirement for capital adequacy purposes, amount	$ 1,541	$ 1,446
Requirement for capital adequacy purposes, ratio (in hundredths)	6.00%	6.00%
To be well capitalized under regulatory provisions, amount	$ 2,054	$ 1,928
To be well capitalized under regulatory provisions, ratio (in hundredths)	8.00%	8.00%
Total Capital (to Risk-Weighted Assets)
Actual, amount	$ 6,490	$ 6,207
Actual, ratio (in hundredths)	25.30%	25.80%
Requirement for capital adequacy purposes, amount	$ 2,054	$ 1,928
Requirement for capital adequacy purposes, ratio (in hundredths)	8.00%	8.00%
To be well capitalized under regulatory provisions, amount	$ 2,568	$ 2,410
To be well capitalized under regulatory provisions, ratio (in hundredths)	10.00%	10.00%
Tier 1 leverage
Actual, amount	$ 6,183	$ 5,971
Actual, ratio (in hundredths)	14.20%	15.70%
Requirement for capital adequacy purposes, amount	$ 1,745	$ 1,525
Requirement for capital adequacy purposes, ratio (in hundredths)	4.00%	4.00%
To be well capitalized under regulatory provisions, amount	$ 2,181	$ 1,906
To be well capitalized under regulatory provisions, ratio (in hundredths)	5.00%	5.00%
RJ Bank
Common Equity Tier 1 Capital (to Risk-Weighted Assets)
Actual, amount	$ 2,232	$ 2,246
Actual, ratio (in hundredths)	12.70%	13.20%
Requirement for capital adequacy purposes, amount	$ 792	$ 764
Requirement for capital adequacy purposes, ratio (in hundredths)	4.50%	4.50%
To be well capitalized under regulatory provisions, amount	$ 1,144	$ 1,103
To be well capitalized under regulatory provisions, ratio (in hundredths)	6.50%	6.50%
Tier 1 Capital (to Risk-Weighted Assets)
Actual, amount	$ 2,232	$ 2,246
Actual, ratio (in hundredths)	12.70%	13.20%
Requirement for capital adequacy purposes, amount	$ 1,056	$ 1,018
Requirement for capital adequacy purposes, ratio (in hundredths)	6.00%	6.00%
To be well capitalized under regulatory provisions, amount	$ 1,408	$ 1,358
To be well capitalized under regulatory provisions, ratio (in hundredths)	8.00%	8.00%
Total Capital (to Risk-Weighted Assets)
Actual, amount	$ 2,454	$ 2,458
Actual, ratio (in hundredths)	13.90%	14.50%
Requirement for capital adequacy purposes, amount	$ 1,408	$ 1,358
Requirement for capital adequacy purposes, ratio (in hundredths)	8.00%	8.00%
To be well capitalized under regulatory provisions, amount	$ 1,760	$ 1,697
To be well capitalized under regulatory provisions, ratio (in hundredths)	10.00%	10.00%
Tier 1 leverage
Actual, amount	$ 2,232	$ 2,246
Actual, ratio (in hundredths)	8.10%	8.80%
Requirement for capital adequacy purposes, amount	$ 1,102	$ 1,021
Requirement for capital adequacy purposes, ratio (in hundredths)	4.00%	4.00%
To be well capitalized under regulatory provisions, amount	$ 1,377	$ 1,276
To be well capitalized under regulatory provisions, ratio (in hundredths)	5.00%	5.00%
Raymond James & Associates Inc
Alternative Method Elected [Abstract]
Net capital as a percent of aggregate debit items (in hundredths)	41.50%	39.70%
Net capital	$ 1,122	$ 1,056
Less: required net capital	(54)	(53)
Excess net capital	$ 1,068	$ 1,003