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Selected Quarterly Financial Data (unaudited) (Tables)
 12 Months Ended
Dec. 31, 2011
Quarterly Financial Data
2011Q1 2011 Q2 2011 Q3 2011 Q4 2011
Revenues $4,607,618 $4,845,338 $4,980,201 $5,574,431
Gross profit  2,699,051  2,880,287  3,066,265  3,523,339
Net income attributable to EMC Corporation  477,148  546,494  605,649  832,046
Net income per weighted average share, diluted: common shareholders$0.21 $0.24 $0.27 $0.38
            
2010Q1 2010 Q2 2010 Q3 2010 Q4 2010
Revenues $3,890,692 $4,023,497 $4,212,271 $4,888,666
Gross profit  2,218,519  2,359,199  2,486,974  2,966,289
Net income attributable to EMC Corporation  372,704  426,216  472,516  628,559
Net income per weighted average share, diluted: common shareholders$0.17 $0.20 $0.22 $0.29