CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net (losses) gains on derivative instruments, net of tax	$ 5	$ (9)	$ (27)
Reclassifications of net (gains) losses on derivative instruments, net of tax	14	13	(1)
Foreign currency translation adjustments, net of tax	14	21	(55)
Benefit plans, principally actuarial (losses) gains, net of tax	2	(2)	(10)
Reclassifications of benefit plans actuarial (gains) losses and net prior service cost (benefit), net of tax	$ 0	$ 1	$ (1)