Net financing charges includes interest expense, interest income, bank fees and amortization of debt issuance costs.

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- Definition

Amount of income or loss from continuing operations for the reportable segment before income taxes and noncontrolling interests excluding net financing charges, significant restructuring costs and net mark-to-market adjustments on pension and postretirement plans.

+ References

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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-Name Regulation S-X (SX)

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- Definition

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Segment Information - Financial Information Related to Company's Reportable Segments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended		12 Months Ended
	Mar. 31, 2013	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2012
Segment Reporting Information [Line Items]
Net Sales	$ 10,430			$ 10,565	$ 20,852	$ 20,982
Segment Income	545			582	1,086	1,203
Restructuring costs	(84)	(245)	(52)		(84)		(297)
Net financing charges	(66)			(63)	(127)	(112)
Income before income taxes	395			519	875	1,091
Building Efficiency
Segment Reporting Information [Line Items]
Net Sales	3,456			3,556	6,988	7,098
Segment Income	139			162	311	307
Automotive Experience
Segment Reporting Information [Line Items]
Net Sales	5,414			5,596	10,628	10,857
Segment Income	185			234	286	435
Power Solutions
Segment Reporting Information [Line Items]
Net Sales	1,560			1,413	3,236	3,027
Segment Income	221			186	489	461
North America Systems \| Building Efficiency
Segment Reporting Information [Line Items]
Net Sales	591			580	1,124	1,132
Segment Income	55			62	103	115
North America Service \| Building Efficiency
Segment Reporting Information [Line Items]
Net Sales	478			504	933	1,018
Segment Income	28			15	48	33
Global Workplace Solutions \| Building Efficiency
Segment Reporting Information [Line Items]
Net Sales	1,078			1,076	2,212	2,162
Segment Income	17			6	52	16
Asia \| Building Efficiency
Segment Reporting Information [Line Items]
Net Sales	427			458	932	931
Segment Income	40			51	106	113
Other \| Building Efficiency
Segment Reporting Information [Line Items]
Net Sales	882			938	1,787	1,855
Segment Income	(1)			28	2	30
Seating \| Automotive Experience
Segment Reporting Information [Line Items]
Net Sales	4,077			4,177	7,966	8,072
Segment Income	180			196	265	385
Electronics \| Automotive Experience
Segment Reporting Information [Line Items]
Net Sales	328			377	641	717
Segment Income	24			37	50	66
Interiors \| Automotive Experience
Segment Reporting Information [Line Items]
Net Sales	1,009			1,042	2,021	2,068
Segment Income	$ (19)			$ 1	$ (29)	$ (16)