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Non-controlling Interest in VMware, Inc. (Tables)
9 Months Ended
Sep. 30, 2011
Effect of Changes in Ownership Interest in VMware on Equity
   For the Nine Months Ended
   September 30, September 30,
   2011 2010
 Net income attributable to EMC Corporation$ 1,629,291 $ 1,271,436
 Transfers (to) from the non-controlling interest in VMware, Inc.:     
  Increase in EMC Corporation’s additional paid-in-capital for VMware’s equity     
  issuances  102,612   123,970
  Decrease in EMC Corporation’s additional paid-in-capital for VMware’s other     
  equity activity  (370,881)   (275,509)
 Net transfers to non-controlling interest  (268,269)   (151,539)
 Change from net income attributable to EMC Corporation and transfers from the     
  non-controlling interest in VMware, Inc.$ 1,361,022 $ 1,119,897