REGULATORY CAPITAL REQUIREMENTS (Details) $ in Millions	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Requirements of broker-dealer subsidiaries [Abstract]
Minimum net capital allowed under the alternative net capital requirement	$ 1.5
Percentage of aggregate debit items allowed for net capital, under the alternative net capital requirement (in hundredths)	0.02
Raymond James Financial Inc
Common Equity Tier 1 Capital (to Risk-Weighted Assets) [Abstract]
Actual, amount	$ 6,490.0	$ 5,971.0
Actual, ratio (in thousandths)	0.242	0.248
Requirement for capital adequacy purposes, amount	$ 1,208.0	$ 1,085.0
Requirement for capital adequacy purposes, ratio (in thousandths)	0.045	0.045
To be well-capitalized under regulatory provisions, amount	$ 1,744.0	$ 1,567.0
To be well-capitalized under regulatory provisions, ratio (in thousandths)	0.065	0.065
Tier I Capital (to Risk-Weighted Assets) [Abstract]
Actual, amount	$ 6,490.0	$ 5,971.0
Actual, ratio (in thousandths)	0.242	0.248
Requirement for capital adequacy purposes, amount	$ 1,610.0	$ 1,446.0
Requirement for capital adequacy purposes, ratio (in thousandths)	0.060	0.060
To be well-capitalized under regulatory provisions, amount	$ 2,147.0	$ 1,928.0
To be well-capitalized under regulatory provisions, ratio (in thousandths)	0.080	0.080
Total Capital (to risk-weighted assets) [Abstract]
Actual, amount	$ 6,804.0	$ 6,207.0
Actual ratio (in thousandths)	0.254	0.258
Requirement for capital adequacy purposes, amount	$ 2,147.0	$ 1,928.0
Requirement for capital adequacy purposes, ratio (in thousandths)	0.080	0.080
To be well-capitalized under regulatory provisions, amount	$ 2,684.0	$ 2,410.0
To be well-capitalized under regulatory provisions, ratio (in thousandths)	0.100	0.100
Tier I Leverage [Abstract]
Actual, amount	$ 6,490.0	$ 5,971.0
Actual, ratio (in thousandths)	0.142	0.157
Requirement for capital adequacy purposes, amount	$ 1,824.0	$ 1,525.0
Requirement for capital adequacy purposes, ratio (in thousandths)	0.040	0.040
To be well-capitalized under regulatory provisions, amount	$ 2,280.0	$ 1,906.0
To be well-capitalized under regulatory provisions, ratio (in thousandths)	0.050	0.050
RJ Bank
Common Equity Tier 1 Capital (to Risk-Weighted Assets) [Abstract]
Actual, amount	$ 2,279.0	$ 2,246.0
Actual, ratio (in thousandths)	0.130	0.132
Requirement for capital adequacy purposes, amount	$ 788.0	$ 764.0
Requirement for capital adequacy purposes, ratio (in thousandths)	0.045	0.045
To be well-capitalized under regulatory provisions, amount	$ 1,138.0	$ 1,103.0
To be well-capitalized under regulatory provisions, ratio (in thousandths)	0.065	0.065
Tier I Capital (to Risk-Weighted Assets) [Abstract]
Actual, amount	$ 2,279.0	$ 2,246.0
Actual, ratio (in thousandths)	0.130	0.132
Requirement for capital adequacy purposes, amount	$ 1,051.0	$ 1,018.0
Requirement for capital adequacy purposes, ratio (in thousandths)	0.060	0.060
To be well-capitalized under regulatory provisions, amount	$ 1,401.0	$ 1,358.0
To be well-capitalized under regulatory provisions, ratio (in thousandths)	0.080	0.080
Total Capital (to risk-weighted assets) [Abstract]
Actual, amount	$ 2,500.0	$ 2,458.0
Actual ratio (in thousandths)	0.143	0.145
Requirement for capital adequacy purposes, amount	$ 1,401.0	$ 1,358.0
Requirement for capital adequacy purposes, ratio (in thousandths)	0.080	0.080
To be well-capitalized under regulatory provisions, amount	$ 1,751.0	$ 1,697.0
To be well-capitalized under regulatory provisions, ratio (in thousandths)	0.100	0.100
Tier I Leverage [Abstract]
Actual, amount	$ 2,279.0	$ 2,246.0
Actual, ratio (in thousandths)	0.077	0.088
Requirement for capital adequacy purposes, amount	$ 1,183.0	$ 1,021.0
Requirement for capital adequacy purposes, ratio (in thousandths)	0.040	0.040
To be well-capitalized under regulatory provisions, amount	$ 1,479.0	$ 1,276.0
To be well-capitalized under regulatory provisions, ratio (in thousandths)	0.050	0.050
Raymond James and Associates Inc
Alternative Method Elected [Abstract]
Net capital as a percent of aggregate debit items (in thousandths)	0.480	0.397
Net capital	$ 1,245.0	$ 1,056.0
Less: required net capital	(52.0)	(53.0)
Excess net capital	$ 1,193.0	$ 1,003.0