Shareholders' Equity - Reconciliation from Basic To Diluted Earnings Per Share for both Numerators and Denominators (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Numerator:
Net income attributable to EMC Corporation	$ 581	$ 487	$ 849	$ 739
Incremental dilution from VMware	(1)	(1)	(1)	(2)
Net income – dilution attributable to EMC Corporation	$ 580	$ 486	$ 848	$ 737
Denominator:
Weighted average shares, basic	1,955	1,927	1,952	1,950
Weighted common stock equivalents	18	20	17	21
Weighted average shares, diluted	1,973	1,947	1,969	1,971