Balance Sheet Components (Property and Equipment) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	$ 38,908	$ 32,746
Less: accumulated depreciation and amortization	(10,570)	(8,863)
Property and equipment, net	28,338	23,883
Land and buildings
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	15,353	13,326
Cost basis of property and equipment under capital lease	258
Information technology assets
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	13,354	10,918
Construction in progress
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	7,799	6,555
Leasehold improvements
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	2,321	1,868
Furniture and fixtures
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	$ 81	$ 79