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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2012
Earnings Per Share [Abstract]
Basic And Diluted Earnings Per Share
Quarter Ended June 30,
Six Months Ended June 30,
(in millions, except shares and per share data)
2012
2011
2012
2011
Net Income Attributable to CME Group
$
244.9
$
293.7
$
511.5
$
750.3
Weighted Average Number of Common Shares (in thousands):
Basic
331,078
333,794
330,946
334,038
Effect of stock options and restricted stock awards
1,084
1,077
1,063
1,052
Diluted
332,162
334,871
332,009
335,090
Earnings per Common Share Attributable to CME Group:
Basic
$
0.74
$
0.88
$
1.55
$
2.25
Diluted
0.74
0.88
1.54
2.24
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