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Employee Benefit Plans - Additional Information (Details) $ in Millions	3 Months Ended			6 Months Ended
	Mar. 31, 2025 USD ($)	Dec. 31, 2024 Employee	Mar. 31, 2024 USD ($)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of employess treminated in restructuring activities | Employee		40
Curtailment loss				$ 1
Other net periodic benefit (loss) income	$ (1)		$ (2)	(3)	$ (4)
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual contributions to benefit plans in period				3
Estimated future contributions in current fiscal year	2			2
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual contributions to benefit plans in period				4
Estimated future contributions in current fiscal year	$ 2			$ 2

X

- Definition

Amount of net gain recognized in net periodic benefit cost due to settlements, curtailments and other expense. Curtailments result from an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. Settlements result from an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits.

+ References

No definition available.

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X

- Definition

Other defined benefit plan net periodic benefit income expense.

+ References

No definition available.

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

+ References

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-Topic 715
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-Name Accounting Standards Codification
-Section 55
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of contribution expected to be received by defined benefit plan from employer in remainder of current fiscal year. Excludes contribution previously paid by employer in current fiscal year.

+ References

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-Topic 715
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- Definition

The number of positions eliminated during the period as a result of restructuring activities.

+ References

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