Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (20)	$ (49)	$ (110)	$ 218
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(155)	25	(122)	62
Realized and unrealized gains (losses) on derivatives	(7)	17	(5)	34
Other comprehensive income (loss)	(162)	42	(127)	96
Total comprehensive income (loss)	(182)	(7)	(237)	314
Comprehensive income (loss) attributable to noncontrolling interests	(10)	23	43	79
Comprehensive income (loss) attributable to Adient	$ (172)	$ (30)	$ (280)	$ 235