REGULATORY CAPITAL REQUIREMENTS, RJ&A (Details) - Raymond James and Associates Inc $ in Millions	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Schedule Of Compliance With Regulatory Capital Requirements, Broker-Dealer [Line Items]
Net capital as a percent of aggregate debit items	0.721	0.480
Net capital	$ 2,035	$ 1,245
Less: required net capital	(56)	(52)
Excess net capital	$ 1,979	$ 1,193

An entity's net capital as a percentage of aggregate debit items.

No definition available.

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Schedule Of Compliance With Regulatory Capital Requirements, Broker-Dealer [Line Items]

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Amount of net capital in excess of minimum required net capital, calculated under Alternative Standard.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Rule 15c3-1
-Number 240
-Section 15c3-1

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Minimum amount of net capital of broker-dealer and its subsidiary, calculated under Alternative Standard.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Rule 15c3-1
-Number 240
-Section 15c3-1

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Amount of net capital of broker-dealer.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Rule 15c3-1
-Number 240
-Section 15c3-1

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