Reconciliation from Basic To Diluted Earnings Per Share for both Numerators and Denominators (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator:
Net income attributable to EMC Corporation	$ 589	$ 701	$ 980	$ 1,281
Incremental dilution from VMware	(1)	(2)	(3)	(3)
Net income - dilution attributable to EMC Corporation	$ 588	$ 699	$ 977	$ 1,278
Denominator:
Weighted average shares, basic	2,037	2,092	2,033	2,097
Weighted common stock equivalents	27	29	27	30
Assumed conversion of the 2013 Notes and associated warrants	0	53	10	54
Weighted average shares, diluted	2,064	2,174	2,070	2,181