Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018
Operating Activities
Net income (loss) attributable to Adient	$ (149)	$ (168)	$ (166)	$ (384)
Income attributable to noncontrolling interests	(23)	(25)	(51)	(45)
Net income (loss)	(126)	(143)	(115)	(339)
Adjustments to reconcile net income (loss) to cash provided (used) by operating activities:
Depreciation	72	101	137	197
Amortization of intangibles			20	24
Pension and postretirement benefit expense (benefit)			2	(5)
Pension and postretirement contributions, net			(13)	11
Equity in earnings of partially-owned affiliates, net of dividends received (includes purchase accounting amortization of $0, and $11, respectively)			(117)	(103)
Deferred income taxes			40	232
Non-cash impairment charges			66	299
Equity-based compensation			8	30
Other			7	6
Changes in assets and liabilities:
Receivables			90	(303)
Inventories			(12)	(26)
Other assets			62	(21)
Restructuring reserves			(70)	(82)
Accounts payable and accrued liabilities			(51)	13
Accrued income taxes			(14)	(83)
Cash provided (used) by operating activities			40	(150)
Investing Activities
Capital expenditures	(108)	(123)	(252)	(266)
Sale of property, plant and equipment			58	2
Changes in long-term investments			0	(5)
Other			4	0
Cash provided (used) by investing activities			(190)	(269)
Financing Activities
Increase (decrease) in short-term debt			3	135
Repayment of long-term debt			(1)	0
Debt financing costs			(8)	(1)
Cash dividends			(26)	(51)
Dividends paid to noncontrolling interests			(43)	(34)
Formation of consolidated joint venture			28	0
Other			(2)	(4)
Cash provided (used) by financing activities			(49)	45
Effect of exchange rate changes on cash and cash equivalents			3	18
Increase (decrease) in cash and cash equivalents			(196)	(356)
Cash and cash equivalents at beginning of period			687	709	$ 709
Cash and cash equivalents at end of period	$ 491	$ 353	$ 491	$ 353	$ 687