AVAILABLE-FOR-SALE SECURITIES, Contractual Maturities (Details) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 30, 2020
Carrying value
Total	$ 8,315	$ 7,650
Raymond James Bank
Amortized cost
Within one year	21
After one but within five years	387
After five but within ten years	3,471
After ten years	4,443
Cost basis	8,322	7,531
Carrying value
Within one year	21
After one but within five years	392
After five but within ten years	3,466
After ten years	4,436
Total	$ 8,315	7,650
Weighted-average yield
Within one year	2.24%
After one but within five years	1.61%
After five but within ten years	1.15%
After ten years	1.08%
Total	1.14%
Raymond James Bank | Agency residential MBS
Amortized cost
Within one year	$ 0
After one but within five years	80
After five but within ten years	2,554
After ten years	2,534
Cost basis	5,168	4,064
Carrying value
Within one year	0
After one but within five years	84
After five but within ten years	2,570
After ten years	2,535
Total	5,189	4,135
Raymond James Bank | Agency commercial MBS
Amortized cost
Within one year	21
After one but within five years	298
After five but within ten years	878
After ten years	88
Cost basis	1,285	948
Carrying value
Within one year	21
After one but within five years	299
After five but within ten years	856
After ten years	88
Total	1,264	969
Raymond James Bank | Agency CMOs
Amortized cost
Within one year	0
After one but within five years	1
After five but within ten years	32
After ten years	1,821
Cost basis	1,854	2,504
Carrying value
Within one year	0
After one but within five years	1
After five but within ten years	33
After ten years	1,813
Total	1,847	2,530
Raymond James Bank | Other securities
Amortized cost
Within one year	0
After one but within five years	8
After five but within ten years	7
After ten years	0
Cost basis	15	15
Carrying value
Within one year	0
After one but within five years	8
After five but within ten years	7
After ten years	0
Total	$ 15	$ 16