SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Allowance for doubtful accounts
Valuation and Qualifying Account
Balance at beginning of year	$ 64	$ 53	$ 42
Charged (credited) to costs and expenses	69	61	36
Other	(62)	(50)	(25)
Balance at end of year	71	64	53
Deferred tax assets valuation allowance
Valuation and Qualifying Account
Balance at beginning of year	141	138	105
Charged (credited) to costs and expenses	(38)	(14)	23
Other	38	17	10
Balance at end of year	$ 141	$ 141	$ 138