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Non-controlling Interest in VMware, Inc. (Tables)
3 Months Ended
Mar. 31, 2012
Effect of Changes in Ownership Interest in VMware on Equity
   For the Three Months Ended
   March 31, March 31,
   2012 2011
 Net income attributable to EMC Corporation$ 586,842 $ 477,148
 Transfers (to) from the non-controlling interest in VMware, Inc.:     
  Increase in EMC Corporation’s additional paid-in-capital for VMware’s equity     
  issuances  37,982   35,069
  Decrease in EMC Corporation’s additional paid-in-capital for VMware’s other     
  equity activity  (37,052)   (104,915)
 Net transfers (to) from non-controlling interest  930   (69,846)
 Change from net income attributable to EMC Corporation and transfers from the     
  non-controlling interest in VMware, Inc.$ 587,772 $ 407,302