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Note 12. Segment Reporting (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net	$ 4,204	$ 4,026
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net	102	227
Becoming Adient Costs	19	15
Separation Costs	0	10
Restructuring Related Charges	11	8
Other Income (Expense) Items	(14)	(13)
Interest Income (Expense), Net	(33)	(35)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	69	192
Other Nonrecurring Expense	0	12
Income Tax Expense (Benefit)	265	28
Becoming Adient Costs NonCash	6	13
Seating Segment [Member]
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net	138	253
Interiors Segment [Member]
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net	25	30
Acquisition-related Costs [Member]
Segment Reporting Information [Line Items]
Other Depreciation and Amortization	17	$ 10
Futuris [Member]
Segment Reporting Information [Line Items]
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed	6
Corporate Joint Venture [Member]
Segment Reporting Information [Line Items]
Income Tax Expense (Benefit)	$ 8

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Restructuring Related Charges - restructuring related charges that do not meet the definition of restructuring under ASC 420.

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Separation Costs - costs associated with becoming an independent company

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Amount of income (loss) from continuing operations, nonoperating income (expense) and income (loss) from equity method investments, before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of interest income (expense).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The net amount of operating interest income (expense).

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Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

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