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Number Of Facilities Sold

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Acquisitions and Divestitures - Acquisitions (Details) ¥ in Millions, $ in Millions									3 Months Ended							9 Months Ended		12 Months Ended
	Apr. 01, 2021 USD ($)	Mar. 31, 2021 USD ($)	Mar. 12, 2021 USD ($)	Mar. 12, 2021 CNY (¥)	Sep. 30, 2020 USD ($) facility employee	Jun. 24, 2020 USD ($)	Jan. 31, 2020 USD ($)	Oct. 25, 2019 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2021 CNY (¥)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Oct. 11, 2018
Business Acquisition [Line Items]
Proceeds from business divestitures																$ 72	$ 0
Intangible asset					$ 602				$ 654							654		$ 602
Gain on sale of joint venture									33		$ 33					33	(222)
Non-cash impairment charges						$ 6										11	27
Equity income (loss)									38				$ 48			220	(57)
Loss on divestitures - net									0				0			0	25
Initial contributions from joint venture															$ 28
Loss on deconsolidation									0				0			0	25
One-time tax gain									28							$ 36
China
Business Acquisition [Line Items]
Non-cash impairment charges													27				27
Assets held for sale
Business Acquisition [Line Items]
Non-cash impairment charges									1			$ 9
AYM
Business Acquisition [Line Items]
Proceeds from intangible assets							$ 20
Yanfeng
Business Acquisition [Line Items]
License revenue payment			$ 59	¥ 385
Automotive Fabrics Manufacturing \| Disposed of by sale
Business Acquisition [Line Items]
Proceeds from business divestitures					170
Cash divested from deconsolidation					4
Goodwill					$ 80													80
Number of facilities sold \| facility					11
Number of employees \| employee					1,300
Sales																		99	$ 130
Pre-tax income																			8
RECARO \| Disposed of by sale
Business Acquisition [Line Items]
Loss on divestitures - net														$ 21
Entities in China and Properties in U.S. \| Assets held for sale
Business Acquisition [Line Items]
Non-cash impairment charges																		21
Entities in China and Properties in U.S. \| Assets held for sale \| Operating segments \| Americas
Business Acquisition [Line Items]
Non-cash impairment charges																		12
Entities in China and Properties in U.S. \| Assets held for sale \| Operating segments \| China
Business Acquisition [Line Items]
Non-cash impairment charges																		$ 9
YFAS
Business Acquisition [Line Items]
Proceeds from divestiture of interest in joint venture			1,210	8,064
Potential payments to acquire Interest in joint venture			271	1,754
Intangible asset													92				92		$ 92
Amortization period																			18 years
YFAS \| Payable upon Sale Closing
Business Acquisition [Line Items]
Proceeds from divestiture of interest in joint venture			519	3,446
YFAS \| Payable on or before the later of December 21, 2021 and Sale Closing
Business Acquisition [Line Items]
Proceeds from divestiture of interest in joint venture			691	4,618
YFAS \| Valuation, Income Approach \| Measurement Input, Cap Rate \| Significant Unobservable Inputs (Level 3)
Business Acquisition [Line Items]
Measurement input, discount rate																10.50%
YFM
Business Acquisition [Line Items]
Proceeds from divestiture of interest in joint venture			11	71
YFAT
Business Acquisition [Line Items]
Proceeds from business divestitures			17	113
YFAT \| KEIPER
Business Acquisition [Line Items]
Proceeds from divestiture of interest in joint venture			6	38
CQYFAS \| The Boxun Agreement
Business Acquisition [Line Items]
Proceeds from divestiture of interest in joint venture			124	825
GZDFAS \| YFAS
Business Acquisition [Line Items]
Proceeds from divestiture of interest in joint venture			56	371
YHAS \| YFAS
Business Acquisition [Line Items]
Proceeds from business divestitures			$ 2	¥ 13
YFAI
Business Acquisition [Line Items]
Investment ownership							30.00%
Proceeds from business divestitures							$ 369
Proceeds from sale of businesses, paid at closing							309
Proceeds from divestiture of businesses, paid on a deferred basis post-closing							$ 60
Percent of distributable earnings to be paid out							30.00%
Proceeds from sale of equity method investments							$ 60
Proceeds from previous divestiture of interest in joint venture, earnout payments											$ 19
Proceeds from transactions							329
Non-cash impairment charges						$ 9	$ 216						$ 6	$ 216
Equity income (loss)																			$ 40
One-time tax gain																	(1)
YFAI \| Valuation, Income Approach \| Measurement Input, Cap Rate \| Significant Unobservable Inputs (Level 3)
Business Acquisition [Line Items]
Measurement input, discount rate																15.00%
Shenyang Jinbei Adient Automative Components Co., Ltd
Business Acquisition [Line Items]
Proceeds from divestiture of interest in joint venture	$ 53	$ 58
Adient Aerospace
Business Acquisition [Line Items]
Cash divested from deconsolidation								$ 37
Loss on deconsolidation																	$ 4
Goodwill impairment								21
Proceeds from collection of notes receivable									15
Yanfeng \| YFAS
Business Acquisition [Line Items]
Investment ownership			50.01%	50.01%
Yanfeng \| AYM
Business Acquisition [Line Items]
Investment ownership			50.00%	50.00%
Adient \| YFAS
Business Acquisition [Line Items]
Investment ownership			49.99%	49.99%
Adient \| AYM
Business Acquisition [Line Items]
Investment ownership			50.00%	50.00%
YFAS
Business Acquisition [Line Items]
Distributed earnings			$ 635	¥ 4,168
Dividends paid									$ 436	¥ 2,809
RECARO \| Disposed of by sale
Business Acquisition [Line Items]
Net sales																			$ 148
Americas \| Adient Aerospace
Business Acquisition [Line Items]
Loss on deconsolidation								$ 4
YFAS \| YFAS
Business Acquisition [Line Items]
Ownership interest			49.99%	49.99%
YFAS \| YFM
Business Acquisition [Line Items]
Investment ownership			70.00%	70.00%
YFAS \| YFAT
Business Acquisition [Line Items]
Ownership interest			75.00%	75.00%
YFAS \| CQYFAS
Business Acquisition [Line Items]
Ownership interest			50.00%	50.00%
Yanfeng \| YFAI
Business Acquisition [Line Items]
Ownership interest																70.00%
Yanfeng \| YFAS
Business Acquisition [Line Items]
Ownership interest			50.01%	50.01%
Adient \| YFAT \| KEIPER
Business Acquisition [Line Items]
Ownership interest			25.00%	25.00%
Adient \| CQYFAS
Business Acquisition [Line Items]
Ownership interest			100.00%	100.00%
Adient \| GZDFAS \| YFAS
Business Acquisition [Line Items]
Ownership interest			25.00%	25.00%
Adient \| YHAS \| YFAS
Business Acquisition [Line Items]
Ownership interest			10.00%	10.00%
Adient \| YFAI
Business Acquisition [Line Items]
Ownership interest																30.00%
Adient \| YFAS
Business Acquisition [Line Items]
Ownership interest			49.99%	49.99%
Boxun \| CQYFAS \| The Boxun Agreement
Business Acquisition [Line Items]
Ownership interest			25.00%	25.00%
Shenyang Jinbei Adient Automative Components Co., Ltd
Business Acquisition [Line Items]
Ownership interest		50.00%
Adient Aerospace
Business Acquisition [Line Items]
Investment ownership								19.99%
Ownership interest																				50.01%