The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

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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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The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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The amount of acquisition cost of a business combination allocated to assets acquired.

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Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

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The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will not be amortized. Does not include goodwill.

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This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date.

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Gain recognized in the period that is infrequent in occurrence or unusual in nature.

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Acquisitions (Details) (USD $) In Millions	12 Months Ended
Acquisitions (Details) (USD $) In Millions	Sep. 30, 2011	Feb. 28, 2011 EMV [Member]	Jul. 31, 2010 Crissair, Inc. [Member]	Sep. 03, 2010 Xtensible Solutions, Inc. [Member]	Sep. 21, 2009 Firetide, Inc. [Member]	Jul. 02, 2009 Complus Systems Pvt Ltd. [Member]
Business Acquisition [Line Items]
Purchase price		$ 5	$ 27	$ 4
Goodwill as a result of the transaction		4.8	9.0	15.0
Trade names			4.3
Amortizable identifiable intangible assets			7.4
Gain recorded in other (income) expenses, net	7.6
Minority equity interest acquired					4
Assets acquired for cash						$ 1.2