Consolidated Statements of Income (Loss) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Net sales	$ 3,480	$ 3,848
Cost of sales	3,307	3,507
Gross profit	173	341
Selling, general and administrative expenses	162	149
Restructuring and impairment costs	4	7
Equity income (loss)	33	97
Earnings (loss) before interest and income taxes	40	282
Net financing charges	50	59
Other pension expense (income)	(1)	(2)
Income (loss) before income taxes	(9)	225
Income tax provision (benefit)	21	52
Net income (loss)	(30)	173
Income (loss) attributable to noncontrolling interests	24	23
Net income (loss) attributable to Adient	$ (54)	$ 150
Earnings (loss) per share:
Basic (in dollars per share)	$ (0.57)	$ 1.60
Diluted (in dollars per share)	$ (0.57)	$ 1.58
Shares used in computing earnings per share:
Basic (in shares)	94.6	94.0
Diluted (in shares)	94.6	94.8