v2.4.0.8

Acquisitions And Divestitures Acquisition of Unwired Holdings, Inc. (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended		3 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2014 Subsequent Event [Member] Unwired Technology, LLC [Member]	Oct. 01, 2014 Subsequent Event [Member] Unwired Technology, LLC [Member]	Dec. 31, 2014 Subsequent Event [Member] Unwired Technology, LLC [Member] Minimum [Member]	Dec. 31, 2014 Subsequent Event [Member] Unwired Technology, LLC [Member] Maximum [Member]
Business Acquisition [Line Items]
Date of Acquisition			Oct. 01, 2014
Business Acquisition, Percentage of Voting Interests Acquired				100.00%
Purchase Price, net of acquired cash, excess net working capital and certain tax benefits			$ 190
Acquired cash, excess net working capital and certain tax benefits from acquisition			20
Identifiable net assets acquired				25
Goodwill	456	496		120
Intangible Assets Acquired, Other than Goodwill				$ 65
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					10 years	12 years

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Cash that was held by the acquired business and acquired excess net working capital and certain tax benefits.

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The cash outflow associated with the acquisition of a business, net of the cash, excess net working capital and certain tax benefits acquired from the purchase.

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Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss 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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