Other Income (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Other Income and Expenses [Abstract]
Interest income	$ 3	$ 4	$ 9	$ 10
Royalty income	4	3	11	9
Net legacy asbestos and environmental charges	(1)	(4)	(3)	(13)
Non-operating pension and postretirement benefit credit	4	0	10	0
Fair value adjustments for earnout payments	0	0	0	(5)
Change in fair value of investments	(7)	0	(7)	(3)
Gain on dissolution of Sensia	20	0	20	0
Other	(1)	2	(1)	10
Other income	$ 22	$ 5	$ 39	$ 8

Non Operating Pension And Postretirement Benefit Credit (Cost)

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Other Income (Expense), Other

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Amount, after recovery, of expense for known and estimated future costs arising from requirement to perform environmental remediation.

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Amount of realized and unrealized gain (loss) on investment.

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Income earned by providing the use of assets to an outside party in exchange for a payment or series of payments that is nonoperating in nature.

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