EARNINGS PER SHARE (Tables)

12 Months Ended

Sep. 30, 2025

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Common Share

The following table presents the computation of basic and diluted earnings per common share.

	Year ended September 30,
$ in millions, except per share amounts	2025		2024		2023
Income for basic earnings per common share:
Net income available to common shareholders	$	2,130	$	2,063	$	1,733
Less allocation of earnings and dividends to participating securities	(3)		(4)		(5)
Net income available to common shareholders after participating securities	$	2,127	$	2,059	$	1,728
Income for diluted earnings per common share:
Net income available to common shareholders	$	2,130	$	2,063	$	1,733
Less allocation of earnings and dividends to participating securities	(3)		(4)		(5)
Net income available to common shareholders after participating securities	$	2,127	$	2,059	$	1,728
Common shares:
Average common shares in basic computation	202.0		207.1		211.8
Dilutive effect of outstanding stock options and certain RSUs	4.6		5.2		5.1
Average common and common equivalent shares used in diluted computation	206.6		212.3		216.9
Earnings per common share:
Basic	$	10.53	$	9.94	$	8.16
Diluted	$	10.30	$	9.70	$	7.97
Stock options and certain RSUs excluded from weighted-average diluted common shares because their effect would be antidilutive	0.1		0.1		0.5