General Disclosures [Line Items]

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- Definition

Number Of Channel Partners Worldwide

+ References

No definition available.

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- Definition

Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 7

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-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

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-Topic 805

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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

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (b)

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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Background and Basis of Presentation (Details) $ in Millions				12 Months Ended
	Apr. 01, 2014 USD ($)	Jun. 05, 2012 USD ($)	Dec. 18, 2009 USD ($)	Sep. 30, 2015 USD ($) Partner segment	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Mar. 31, 2014 USD ($)
General Disclosures [Line Items]
Number of segments \| segment				3
Number of channel partners worldwide \| Partner				9,300
Gain on sale of TBU business				$ 0	$ 26	$ 0
Gain (loss) on disposition of business				$ 0	$ 14	$ 0
Product Portfolio
General Disclosures [Line Items]
Number of segments \| segment				2
Nortel Networks
General Disclosures [Line Items]
Purchase price			$ 933
RADVISION Ltd
General Disclosures [Line Items]
Purchase price		$ 230
government IT Professional Services business
General Disclosures [Line Items]
Gain on sale of TBU business	$ 101
Gain (loss) on disposition of business	$ 3
Business acquisition, transaction costs							$ 2