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[Line Items] for Divestitures [Table]

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Number of businesses divested.

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Number of Joint Ventures Divested

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- Definition

Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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- Definition

Amount of tax expense (benefit) on gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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- Definition

Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

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- Definition

Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.

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No definition available.

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- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

The number of businesses acquired by the entity during the period.

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No definition available.

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- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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- Definition

This element represents the cash inflow during the period from the sale of a component of the entity.

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- Definition

The cash inflow from the sale of an investment interest in a joint venture that the reporting entity has not previously accounted for using consolidation or the equity method of accounting.

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Acquisitions and Divestitures Divestitures (Details) $ in Millions	3 Months Ended						12 Months Ended
	Sep. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($) Acquisition
Divestitures [Line Items]
Goodwill, written off related to divestiture							$ 29	$ 265
Proceeds from divestitures							1,646	225	$ 761
Gain (loss) on business divestitures - net							$ 1,340	$ (111)	$ 483
Series of Individually Immaterial Business Acquisitions [Member]
Divestitures [Line Items]
Number of Businesses Acquired							3	4	3
CBRE Group, Inc. [Member] [Member] \| Global Workplace Solutions
Divestitures [Line Items]
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	$ 940						$ (940)
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	643
Income tax expense from disposal							297
Goodwill, written off related to divestiture	220
Proceeds from divestitures	1,400
Yanfeng Automotive Trim Systems [Member] \| Automotive Experience Interiors
Divestitures [Line Items]
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	145
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	38
Goodwill, written off related to divestiture	$ 21
Brookfield Johnson Controls [Member] \| Global Workplace Solutions
Divestitures [Line Items]
Number of Joint Ventures Divested		2
Proceeds from Divestiture of Interest in Joint Venture		$ 141
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax		200					(200)
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax		127
Income tax expense from disposal							73
Goodwill, written off related to divestiture		$ 20
Headliner and Sunvisor [Member]
Divestitures [Line Items]
Cash paid to buyer in divestiture			$ 54
Gain (loss) on divestiture			(95)
Income tax expense from disposal			38
Goodwill, written off related to divestiture			0
Business Divestitures, 2004 \| Global Workplace Solutions
Divestitures [Line Items]
Gain (loss) on divestiture			$ (25)					$ 25
Automotive Experience Electronics
Divestitures [Line Items]
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax								$ 8	$ (578)
Goodwill, written off related to divestiture						$ 177
Proceeds from divestitures				$ 266		701
Gain (loss) on business divestitures - net						$ 476
Business Divestitures, Not Specific
Divestitures [Line Items]
Gain (loss) on divestiture									29
Proceeds from divestitures							$ 119		$ 60
Number of businesses divested							4		2
Proceeds from Divestiture of Businesses, Net of Cash Divested							$ 86
Business Divestitures, Not Specific \| Building Efficiency Systems and Service North America
Divestitures [Line Items]
Gain (loss) on divestiture							7
Goodwill, written off related to divestiture							2
Business Divestitures, Not Specific \| Building Efficiency Products North America
Divestitures [Line Items]
Gain (loss) on divestiture							38
Goodwill, written off related to divestiture							14
Business Divestitures, Not Specific \| Automotive Experience Seating
Divestitures [Line Items]
Gain (loss) on divestiture							10
Goodwill, written off related to divestiture							$ 4
Business Divestitures, Not Specific \| Automotive Experience Interiors
Divestitures [Line Items]
Gain (loss) on divestiture					$ 9
Goodwill, written off related to divestiture					0
Proceeds from divestitures					$ 13
Number of businesses divested					1
Business Divestitures, Not Specific \| Automotive Experience
Divestitures [Line Items]
Goodwill, written off related to divestiture									$ 15
Business Divestitures, Not Specific \| Building Efficiency Rest of World
Divestitures [Line Items]
Gain (loss) on divestiture									$ 22