Discontinued Operations (Revenues and Earnings Attributable to Discontinued Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss from discontinued operations	$ 0	[1]	$ (198)	[1]
Motorola Mobile
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues			1,377
Loss from discontinued operations before income taxes			(274)
Benefits from income taxes			76
Net loss from discontinued operations			$ (198)

[1] (1) Includes stock-based compensation expense as follows: Cost of revenues$95 $160Research and development456 615Sales and marketing147 205General and administrative141 223Discontinued operations48 0Total stock-based compensation expense$887 $1,203