The Company and Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jul. 17, 2015
Property, Plant and Equipment [Line Items]
Capitalized software development costs	$ 136	$ 144
Amortization of previously capitalized software	110	115	$ 103
Advertising expense	1,000	1,000	$ 844
Allowance for doubtful accounts receivable and authorized credits	$ 84	$ 86
Furniture and Fixtures and Vehicles
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	3 years
Minimum
Property, Plant and Equipment [Line Items]
Historical duration of advertising contracts	7 days
General duration of advertising contracts	7 days
Estimated useful lives, intangible assets	1 year
Minimum | Internal Use Software And Website Development
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	1 year
Minimum | Computer Equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	1 year
Minimum | Leasehold Improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	5 years
Maximum
Property, Plant and Equipment [Line Items]
Historical duration of advertising contracts	5 years
General duration of advertising contracts	1 year
Estimated useful lives, intangible assets	8 years
Maximum | Internal Use Software And Website Development
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	5 years
Maximum | Computer Equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	3 years
Maximum | Building and Building Improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	30 years
New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncement, Early Adoption [Line Items]
Amount reclassified from current to noncurrent deferred tax liabilities	$ 1,400
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff | Common stock | PayPal
Class of Stock [Line Items]
Spinoff, Distribution of outstanding common stock to existing stockholders, percentage				100.00%