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Restructuring and Impairments - Schedule of Restructuring Accrual Activity (Details) - Strategic Restructuring Plan $ in Millions	9 Months Ended
	Jun. 30, 2025 USD ($)
Restructuring Reserve [Roll Forward]
Beginning balance	$ 104
Restructuring charges	7
Cash payments	(68)
Foreign currency movements	0
Ending Balance	43
Severance Costs
Restructuring Reserve [Roll Forward]
Beginning balance	99
Restructuring charges	0
Cash payments	(63)
Foreign currency movements	0
Ending Balance	36
Contract Termination Costs
Restructuring Reserve [Roll Forward]
Beginning balance	5
Restructuring charges	7
Cash payments	(5)
Foreign currency movements	0
Ending Balance	$ 7

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve.

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