Product Warranties (Tables)

12 Months Ended

Sep. 30, 2021

Product Warranties Disclosures [Abstract]

Schedule of product warranty liability

The changes in Adient's total product warranty liability are as follows:

	September 30,
(in millions)	2021		2020
Balance at beginning of period	$	24	$	22
Accruals for warranties issued during the period	9		9
Changes in accruals related to pre-existing warranties (including changes in estimates)	(2)		1
Changes in accruals related to business acquisitions	1		—
Changes in accruals related to business divestitures	(1)		(1)
Settlements made (in cash or in kind) during the period	(8)		(7)
Balance at end of period	$	23	$	24