Discontinued Operations Discontinued Operations by Disposal Group - Global Workplace Solutions (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Discontinued Operations by Disposal Group - Global Workplace Solutions [Line Items]
Income from discontinued operations attributable to noncontrolling interests, net of tax	$ 0	$ 6	$ 4	$ 18
Loss from discontinued operations	(325)	(54)	(222)	(167)
Global Workplace Solutions
Discontinued Operations by Disposal Group - Global Workplace Solutions [Line Items]
Net sales	704	979	2,549	3,052
Income from discontinued operations before income taxes	14	24	283	89
Provision for income taxes on discontinued operations	339	13	501	30
Income from discontinued operations attributable to noncontrolling interests, net of tax	0	3	4	10
Loss from discontinued operations	$ (325)	$ 8	$ (222)	$ 49

[Line Items] for Discontinued Operations by Disposal Group - Global Workplace Solutions [Table]

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Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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This element represents the overall income (loss) from a disposal group that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items, which is apportioned to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This item includes the following (net of tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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