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Acquisitions - Additional Information (Detail) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
	Aug. 04, 2025	Oct. 31, 2024	Sep. 30, 2025
Business Acquisition [Line Items]
Businesses acquisition, net of cash acquired			$ 27
Carbon Black Manufacturing Facility [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price	$ 70
Certain Assets and Licensed Related Technology [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price		$ 27
Business acquisition, purchase price allocation, property, plants and equipment		19
Business acquisition, purchase price allocation, intangible assets		$ 8

X

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