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DEBT - Redemption of $4,400 million of Senior Secured Notes due 2026 (Details) - USD ($) $ in Millions			12 Months Ended
	Mar. 28, 2024	Feb. 27, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Debt Instrument [Line Items]
Debt instrument, face amount			$ 24,319
REFINANCING COSTS			58	$ 56	$ 1
Senior Secured Notes $4,400M due 2026 6.25%
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	$ 4,400
Debt Instrument, Redemption Price, Percentage	100.00%
REFINANCING COSTS			19
Write-off of debt issuance costs			21
Debt Instrument, Unamortized Premium. Write-Off			$ (2)
Senior Secured Notes $2,200M due 2032 6.625%
Debt Instrument [Line Items]
Debt instrument, face amount		$ 2,200
Senior Secured Notes $2,200M due 2029 6.375%
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage		100.00%
Debt instrument, face amount		$ 2,200

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