Acquisitions, Goodwill, and Acquired Intangible Assets - Additional Informaiton (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 25, 2014		Dec. 31, 2013
Business Acquisition [Line Items]
Cash paid, net of cash acquired	$ 813
Stock options assumed	44
Indemnification holdback	5
Business Combination, Consideration Transferred	862
Goodwill	3,332	702		2,655
Intangible assets		231	[1]
Property and equipment		21
Deferred tax assets		65
Other assets acquired		34
Deferred tax Liabilities		(90)
Other liabilities assumed		(101)
Business acquisition, allocation		862
Acquired intangible assets weighted-average amortization period	5 years
Fair value of stock options that will be expensed over the remaining service period	39
Twitch Interactive, Inc.
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Sep. 25, 2014
Business Combination, Consideration Transferred	842
Certain Other Companies
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	20
Marketing-related
Business Acquisition [Line Items]
Intangible assets		23	[1]
Contract-based
Business Acquisition [Line Items]
Intangible assets		1	[1]
Technology-based
Business Acquisition [Line Items]
Intangible assets		33	[1]
Customer-related
Business Acquisition [Line Items]
Intangible assets		$ 174	[1]
Minimum
Business Acquisition [Line Items]
Acquired intangible assets estimated useful lives	1 year
Maximum
Business Acquisition [Line Items]
Acquired intangible assets estimated useful lives	5 years

[1] Acquired intangible assets have estimated useful lives of between one and five years, with a weighted-average amortization period of five years.