Business Combinations, Intangibles and Goodwill - Allocation of Purchase Price (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Other Intangible Assets
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Trademarks and Trade Names
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years
Customer Relationships And Customer Lists
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years
Developed Technology Rights
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years
VMware | AirWatch
Business Acquisition [Line Items]
Other current assets	$ 60
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Deferred Revenue	(45)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	1,206
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	(114)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Current Liabilities, Net of Current Assets	(69)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	1,092
Other Assets	17
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	250
Goodwill	879
VMware | Other Intangible Assets | AirWatch
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	14
VMware | Trademarks and Trade Names | AirWatch
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	40
VMware | Customer Relationships And Customer Lists | AirWatch
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	78
VMware | Developed Technology Rights | AirWatch
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 118