REGULATORY CAPITAL REQUIREMENTS, RJ&A (Details) - Raymond James & Associates Inc - USD ($) $ in Millions	Mar. 31, 2026	Sep. 30, 2025
Schedule Of Compliance With Regulatory Capital Requirements, Broker-Dealer [Line Items]
Net capital as a percent of aggregate debit items	30.10%	30.30%
Net capital	$ 1,077	$ 1,030
Less: required net capital	(72)	(68)
Excess net capital	$ 1,005	$ 962

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
-Name Rule 15c3-1
-Number 240
-Section 15c3-1
-Publisher SEC

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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
-Name Rule 15c3-1
-Number 240
-Section 15c3-1
-Publisher SEC

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Amount of net capital of broker-dealer.

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

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