Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 5	$ 95	$ 1	$ 138
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(49)	(92)	(9)	48
Realized and unrealized gains (losses) on derivatives	(23)	11	(20)	50
Other comprehensive income (loss)	(72)	(81)	(29)	98
Total comprehensive income (loss)	(67)	14	(28)	236
Comprehensive income attributable to noncontrolling interests	11	8	60	75
Comprehensive income (loss) attributable to Adient	$ (78)	$ 6	$ (88)	$ 161