AVAILABLE-FOR-SALE SECURITIES, Amortized Cost and Fair Values of AFS Securities (Details) - USD ($) $ in Millions	Mar. 31, 2026	Sep. 30, 2025
Schedule of Available for Sale Securities [Abstract]
Cost basis	$ 6,880	$ 7,410
Gross unrealized gains	5	10
Gross unrealized losses	(483)	(532)
Fair value	6,402	6,888
Agency residential MBS
Schedule of Available for Sale Securities [Abstract]
Cost basis	3,322	3,531
Gross unrealized gains	2	3
Gross unrealized losses	(239)	(265)
Fair value	3,085	3,269
Agency commercial MBS
Schedule of Available for Sale Securities [Abstract]
Cost basis	1,055	1,223
Gross unrealized gains	0	0
Gross unrealized losses	(71)	(85)
Fair value	984	1,138
Agency CMOs
Schedule of Available for Sale Securities [Abstract]
Cost basis	1,393	1,421
Gross unrealized gains	1	3
Gross unrealized losses	(140)	(147)
Fair value	1,254	1,277
U.S. Treasuries
Schedule of Available for Sale Securities [Abstract]
Cost basis	422	429
Gross unrealized gains	1	1
Gross unrealized losses	0	0
Fair value	423	430
Other agency obligations
Schedule of Available for Sale Securities [Abstract]
Cost basis	153	229
Gross unrealized gains	0	0
Gross unrealized losses	(1)	(2)
Fair value	152	227
Non-agency residential MBS
Schedule of Available for Sale Securities [Abstract]
Cost basis	450	484
Gross unrealized gains	0	1
Gross unrealized losses	(31)	(32)
Fair value	419	453
Corporate bonds
Schedule of Available for Sale Securities [Abstract]
Cost basis	69	79
Gross unrealized gains	1	1
Gross unrealized losses	0	(1)
Fair value	70	79
Other
Schedule of Available for Sale Securities [Abstract]
Cost basis	16	14
Gross unrealized gains	0	1
Gross unrealized losses	(1)	0
Fair value	$ 15	$ 15

Schedule Of Available For Sale Securities [Abstract]

No definition available.

Name:	rjf_ScheduleOfAvailableForSaleSecuritiesAbstract
Namespace Prefix:	rjf_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost excluding accrued interest, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancialInstrumentAxis=rjf_AgencyResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=rjf_AgencyCommercialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=rjf_AgencyCollaterizedMortgageObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_OtherDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=rjf_NonAgencyResidentialMBSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_OtherAggregatedInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: