Consolidated Statements of Financial Position - USD ($) $ in Millions	Dec. 31, 2019	Sep. 30, 2019
Assets [Abstract]
Cash and cash equivalents	$ 965	$ 924
Accounts receivable - net	1,522	1,905
Inventories	772	793
Other current assets	540	494
Current assets	3,799	4,116
Property, plant and equipment - net	1,690	1,671
Goodwill	2,157	2,150
Other intangible assets - net	395	405
Investments in partially-owned affiliates	1,321	1,399
Other noncurrent assets	1,002	601
Total assets	10,364	10,342
Liabilities and Shareholders' Equity
Short-term debt	6	22
Current portion of long-term debt	8	8
Accounts payable	2,511	2,709
Accrued compensation and benefits	305	364
Restructuring reserve	109	123
Other Liabilities, Current	744	609
Current liabilities	3,683	3,835
Long-term debt	3,740	3,708
Pension and postretirement benefits	146	151
Other noncurrent liabilities	673	408
Long-term liabilities	4,559	4,267
Commitments and Contingencies (Note 17)
Redeemable noncontrolling interests	38	51
Preferred shares issued, par value $0.001; 100,000,000 shares authorized, Zero shares issued and outstanding at December 31, 2019	0	0
Ordinary shares issued, par value $0.001; 500,000,000 shares authorized, 93,793,433 shares issued and outstanding at December 31, 2019	0	0
Additional paid-in capital	3,963	3,962
Accumulated deficit	(1,716)	(1,545)
Accumulated other comprehensive income (loss)	(504)	(569)
Shareholders' equity attributable to Adient	1,743	1,848
Noncontrolling interests	341	341
Total shareholders' equity	2,084	2,189
Total liabilities and shareholders' equity	$ 10,364	$ 10,342