Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	9 Months Ended
Jun. 30, 2024	Nov. 30, 2023
Goodwill [Roll Forward]
Beginning balance	$ 2,094
Business divestiture	(5)
Currency translation and other	(4)
Ending balance	2,085
Disposed of By Sale \| Adient (Langfang) Seating Co., Ltd
Goodwill [Roll Forward]
Subsidiary, ownership percentage disposed		51.00%
Americas
Goodwill [Roll Forward]
Beginning balance	609
Business divestiture	0
Currency translation and other	(3)
Ending balance	606
EMEA
Goodwill [Roll Forward]
Beginning balance	317
Business divestiture	0
Currency translation and other	8
Ending balance	325
Asia
Goodwill [Roll Forward]
Beginning balance	1,168
Business divestiture	(5)
Currency translation and other	(9)
Ending balance	$ 1,154

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Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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Amount of foreign currency translation gain (loss) which increases (decreases) asset representing future economic benefit from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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Amount of divestiture of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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