ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Tables)

6 Months Ended

Mar. 31, 2022

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table presents the net change in AOCI as well as the changes, and the related tax effects, of each component of AOCI.

$ in millions	Net investment hedges		Currency translations		Subtotal: net investment hedges and currency translations		Available- for-sale securities		Cash flow hedges		Total
Three months ended March 31, 2022
AOCI as of beginning of period	$	80	$	(89)	$	(9)	$	(60)	$	(18)	$	(87)
OCI:
OCI before reclassifications and taxes	(12)		(2)		(14)		(433)		35		(412)
Amounts reclassified from AOCI, before tax	—		—		—		—		4		4
Pre-tax net OCI	(12)		(2)		(14)		(433)		39		(408)
Income tax effect	3		—		3		113		(10)		106
OCI for the period, net of tax	(9)		(2)		(11)		(320)		29		(302)
AOCI as of end of period	$	71	$	(91)	$	(20)	$	(380)	$	11	$	(389)
Six months ended March 31, 2022
AOCI as of beginning of period	$	81	$	(90)	$	(9)	$	(5)	$	(27)	$	(41)
OCI:
OCI before reclassifications and taxes	(14)		(1)		(15)		(505)		43		(477)
Amounts reclassified from AOCI, before tax	—		—		—		—		8		8
Pre-tax net OCI	(14)		(1)		(15)		(505)		51		(469)
Income tax effect	4		—		4		130		(13)		121
OCI for the period, net of tax	(10)		(1)		(11)		(375)		38		(348)
AOCI as of end of period	$	71	$	(91)	$	(20)	$	(380)	$	11	$	(389)
Three months ended March 31, 2021
AOCI as of beginning of period	$	86	$	(93)	$	(7)	$	72	$	(48)	$	17
OCI:
OCI before reclassifications and taxes	(13)		12		(1)		(102)		22		(81)
Amounts reclassified from AOCI, before tax	—		—		—		—		4		4
Pre-tax net OCI	(13)		12		(1)		(102)		26		(77)
Income tax effect	3		—		3		26		(7)		22
OCI for the period, net of tax	(10)		12		2		(76)		19		(55)
AOCI as of end of period	$	76	$	(81)	$	(5)	$	(4)	$	(29)	$	(38)
Six months ended March 31, 2021
AOCI as of beginning of period	$	115	$	(140)	$	(25)	$	89	$	(53)	$	11
OCI:
OCI before reclassifications and taxes	(51)		57		6		(120)		25		(89)
Amounts reclassified from AOCI, before tax	—		2		2		(5)		8		5
Pre-tax net OCI	(51)		59		8		(125)		33		(84)
Income tax effect	12		—		12		32		(9)		35
OCI for the period, net of tax	(39)		59		20		(93)		24		(49)
AOCI as of end of period	$	76	$	(81)	$	(5)	$	(4)	$	(29)	$	(38)