Business Restructuring Charges (Detail) $ in Millions	9 Months Ended
Jun. 30, 2025 USD ($)
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 60
Charged to expense	187
Cash payments	(158)
Ending Balance	76
Other Initiatives
Restructuring Reserve [Roll Forward]
Non-cash settlements	(15)
Other adjustments	2
Employee Termination
Restructuring Reserve [Roll Forward]
Beginning Balance	58
Charged to expense	62
Cash payments	(59)
Ending Balance	63
Employee Termination \| Other Initiatives
Restructuring Reserve [Roll Forward]
Non-cash settlements	0
Other adjustments	2
Other
Restructuring Reserve [Roll Forward]
Beginning Balance	2
Charged to expense	125
Cash payments	(99)
Ending Balance	13
Other \| Other Initiatives
Restructuring Reserve [Roll Forward]
Non-cash settlements	(15)
Other adjustments	$ 0

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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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
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- Definition

Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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Amount of decrease in the reserve for full or partial settlement through consideration other than cash.

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