Consolidated Statements of Financial Position - USD ($) $ in Millions	Mar. 31, 2020	Sep. 30, 2019
Assets [Abstract]
Cash and cash equivalents	$ 1,640	$ 924
Accounts receivable - net	1,344	1,905
Inventories	775	793
Assets held for sale	40	0
Other current assets	477	494
Current assets	4,276	4,116
Property, plant and equipment - net	1,591	1,671
Goodwill	2,018	2,150
Other intangible assets - net	381	405
Investments in partially-owned affiliates	1,279	1,399
Assets held for sale	157	0
Other noncurrent assets	944	601
Total assets	10,646	10,342
Liabilities and Shareholders' Equity
Short-term debt	838	22
Current portion of long-term debt	8	8
Accounts payable	2,203	2,709
Accrued compensation and benefits	287	364
Liabilities held for sale	36	0
Restructuring reserve	146	123
Other current liabilities	705	609
Current liabilities	4,223	3,835
Long-term debt	3,717	3,708
Liabilities held for sale	10	0
Pension and postretirement benefits	130	151
Other noncurrent liabilities	648	408
Long-term liabilities	4,505	4,267
Commitments and Contingencies (Note 17)
Redeemable noncontrolling interests	35	51
Preferred shares issued, par value $0.001; 100,000,000 shares authorized, Zero shares issued and outstanding at March 31, 2020	0	0
Ordinary shares issued, par value $0.001; 500,000,000 shares authorized, 93,878,959 shares issued and outstanding at March 31, 2020	0	0
Additional paid-in capital	3,966	3,962
Accumulated deficit	(1,735)	(1,545)
Accumulated other comprehensive income (loss)	(690)	(569)
Shareholders' equity attributable to Adient	1,541	1,848
Noncontrolling interests	342	341
Total shareholders' equity	1,883	2,189
Total liabilities and shareholders' equity	$ 10,646	$ 10,342