Consolidated Statements of Income (Loss) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net Sales	$ 14,121	$ 13,680	$ 12,670
Cost of sales	13,314	12,854	12,078
Gross profit	807	826	592
Selling, general and administrative expenses	598	537	558
Loss on business divestitures - net	0	26	13
Restructuring and impairment costs	25	21	238
Equity income (loss)	75	1,484	22
Earnings (loss) before interest and income taxes	259	1,726	(195)
Net financing charges	215	311	220
Other pension expense (income)	(10)	(24)	14
Income (loss) before income taxes	54	1,439	(429)
Income tax provision (benefit)	94	249	57
Net income (loss)	(40)	1,190	(486)
Income (loss) attributable to noncontrolling interests	80	82	61
Net income (loss) attributable to Adient	$ (120)	$ 1,108	$ (547)
Earnings per share:
Basic (in dollars per share)	$ (1.27)	$ 11.76	$ (5.83)
Diluted (in dollars per share)	$ (1.27)	$ 11.58	$ (5.83)
Shares used in computing earnings per share:
Basic (in shares)	94.8	94.2	93.8
Diluted (in shares)	94.8	95.7	93.8