Consolidated Statements of Income (Loss) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net sales	$ 3,485	$ 3,242	$ 10,471	$ 10,909
Cost of sales	3,312	3,092	9,947	10,120
Gross profit	173	150	524	789
Selling, general and administrative expenses	142	136	439	433
Restructuring and impairment costs	12	8	20	20
Equity income (loss)	16	38	56	220
Earnings (loss) before interest and income taxes	35	44	121	556
Net financing charges	39	87	172	256
Other pension expense (income)	(4)	(4)	(6)	(8)
Income (loss) before income taxes	0	(39)	(45)	308
Income tax provision (benefit)	20	10	65	90
Net income (loss)	(20)	(49)	(110)	218
Income (loss) attributable to noncontrolling interests	10	22	55	70
Net income (loss) attributable to Adient	$ (30)	$ (71)	$ (165)	$ 148
Earnings (loss) per share:
Basic (in usd per share)	$ (0.32)	$ (0.75)	$ (1.74)	$ 1.57
Diluted (in usd per share)	$ (0.32)	$ (0.75)	$ (1.74)	$ 1.55
Shares used in computing earnings per share:
Basic (in shares)	94.8	94.2	94.7	94.1
Diluted (in shares)	94.8	94.2	94.7	95.6