INTEREST INCOME AND INTEREST EXPENSE (Tables)

12 Months Ended

Sep. 30, 2022

Interest Income (Expense), Net [Abstract]

Interest Income and Interest Expense

The following table details the components of interest income and interest expense.

	Year ended September 30,
$ in millions	2022		2021		2020
Interest income:
Cash and cash equivalents	$	48	$	12	$	41
Assets segregated for regulatory purposes and restricted cash	96		15		28
Trading assets — debt securities	27		13		18
Available-for-sale securities	136		85		83
Brokerage client receivables	100		77		84
Bank loans, net	1,051		593		702
All other	50		28		44
Total interest income	1,508		823		1,000
Interest expense:
Bank deposits	131		23		41
Trading liabilities — debt securities	12		2		3
Brokerage client payables	24		3		11
Other borrowings	21		19		20
Senior notes payable	93		96		85
All other	24		7		18
Total interest expense	305		150		178
Net interest income	1,203		673		822
Bank loan (provision)/benefit for credit losses	(100)		32		(233)
Net interest income after bank loan (provision)/benefit for credit losses	$	1,103	$	705	$	589