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Earnings Per Common Share (Reconciliation of Numerators and Denominators of Basic and Diluted Earnings Per Common Share) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Net income from continuing operations attributable to non-controlling interest $ 227 $ 158 $ 488 $ 295
Net income from continuing operations attributable to non-controlling interest (9) (4) (22) (6)
Net income from continuing operations attributable to ICE Group 218 154 466 289
Net income from discontinued operations attributable to ICE Group 8 0 21 0
Net income (loss) attributable to ICE Group, Inc. $ 226 $ 154 $ 487 $ 289
Basic earnings per share attributable to ICE common shareholders:        
Continuing operations $ 1.89 $ 2.11 $ 4.05 $ 3.97
Discontinued operations $ 0.07 $ 0.00 $ 0.19 $ 0.00
Basic earnings per share $ 1.96 $ 2.11 $ 4.24 $ 3.97
Basic weighted average common shares outstanding 115 73 115 73
Diluted earnings per share attributable to ICE common shareholders:        
Continuing operations $ 1.88 $ 2.09 $ 4.03 $ 3.94
Discontinued operations $ 0.07 $ 0.00 $ 0.19 $ 0.00
Diluted earnings per share $ 1.95 $ 2.09 $ 4.22 $ 3.94
Diluted weighted average common shares outstanding 116 73 116 73
Effect of dilutive securities:        
Effect of dilutive securities - stock options and restricted stock 1 0 1 0