Discontinued Operations (Revenues and Earnings Attributable to Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss from discontinued operations	$ 0	$ (185)	$ 0	$ (451)
Motorola Mobile
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues		1,718		4,901
Loss from discontinued operations before income taxes		(217)		(590)
Benefits from income taxes		32		139
Net loss from discontinued operations		$ (185)		$ (451)