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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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The number of countries in which the entity operates as of balance sheet date.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Average Remaining Service Period of Active Employees

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Summary of Significant Accounting Policies - Additional Information (Detail)		12 Months Ended
	Feb. 01, 2015 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)
Accounting Policies [Abstract]
Number of Countries in which Entity Operates (more than)		200
Number of Reportable Segments		1
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		$ 0
Goodwill, Impairment Loss	$ 0
Expected average employee future service period for United States plans (in years)		9 years
Property, Plant and Equipment [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)		$ 0	$ 0	$ 0
Building
Property, Plant and Equipment [Line Items]
Estimated useful life		40 years
Minimum
Property, Plant and Equipment [Line Items]
Acquired long-lived intangible assets useful life		3 years
Minimum \| Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life		2 years
Minimum \| Building Improvements
Property, Plant and Equipment [Line Items]
Estimated useful life		3 years
Maximum
Property, Plant and Equipment [Line Items]
Acquired long-lived intangible assets useful life		15 years
Maximum \| Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life		7 years
Maximum \| Building Improvements
Property, Plant and Equipment [Line Items]
Estimated useful life		40 years