Acquisitions (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended			9 Months Ended			1 Months Ended	9 Months Ended		1 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Patents and developed technology	Sep. 30, 2014 Customer relationships	Sep. 30, 2014 Trade names and other	Feb. 28, 2014 Nest Labs	Sep. 30, 2014 Nest Labs	Sep. 30, 2014 Series of Individually Immaterial Business Acquisitions	Jul. 31, 2014 Dropcam Inc.	Aug. 31, 2014 Skybox Imaging
Business Acquisition [Line Items]
Ownership interest prior to transaction									12.00%
Acquisition purchase price									$ 2,500		$ 1,100	$ 517	$ 478
Equity interest in acquiree, fair Value									152		33
Cash acquired from acquisition									51		64	11	6
Intangible assets									430		281	55	69
Goodwill	15,461		15,461		11,492				2,320		879	470	401
Net assets acquired													2
Net liabilities assumed									129		77	19
Total approximate cash payment											1,100	517	478
Goodwill expected to be tax deductible											53
Gain resulting from remeasurement	$ 0	$ 0	$ 126	$ 0						$ 103
Acquired intangible assets, weighted-average useful life						5 years 0 months 26 days	4 years 7 months 24 days	6 years 11 months 19 days