Equity and Noncontrolling Interests (Tables)

12 Months Ended

Sep. 30, 2021

Equity [Abstract]

Schedule of AOCI

The following table presents changes in AOCI attributable to Adient:

	Year Ended September 30,
(in millions)	2021		2020		2019
Foreign currency translation adjustments
Balance at beginning of period	$	(634)	$	(558)	$	(523)
Aggregate adjustment for the period, net of tax	17		(76)		(35)
Balance at end of period	(617)		(634)		(558)
Realized and unrealized gains (losses) on derivatives
Balance at beginning of period	(28)		(8)		(7)
Current period changes in fair value, net of tax	22		(34)		(5)
Reclassification to income, net of tax	(2)		14		4
Balance at end of period	(8)		(28)		(8)
Pension plans
Balance at beginning of period	(3)		(3)		(1)
Net reclassifications to AOCI	1		—		(2)
Balance at end of period	(2)		(3)		(3)
Accumulated other comprehensive income (loss), end of period	$	(627)	$	(665)	$	(569)

Schedule of changes in redeemable noncontrolling interest

The following table presents changes in the redeemable noncontrolling interests:

	Year Ended September 30,
(in millions)	2021		2020		2019
Beginning balance	$	43	$	51	$	47
Net income	25		19		30
Foreign currency translation adjustments	(8)		(4)		3
Dividends	(14)		(23)		(29)
Business acquisition	194		—		—
Ending balance	$	240	$	43	$	51