v3.5.0.2
Earnings Per Common Share (Reconciliation of Numerators and Denominators of Basic and Diluted Earnings Per Common Share) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Net income from continuing operations attributable to non-controlling interest $ (6) $ (4) $ (20) $ (18)
Net income (loss) attributable to ICE Group, Inc. $ 344 $ 306 $ 1,070 $ 904
Basic:        
Weighted Average Number of Shares Outstanding, Basic 119,000,000.00 110,000,000.00 119,000,000.00 111,000,000.00
Basic earnings per share $ 2.88 $ 2.77 $ 8.99 $ 8.13
Diluted:        
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares 1,000,000.00 1,000,000.00 1,000,000.00 1,000,000.00
Diluted earnings per share $ 2.86 $ 2.76 $ 8.93 $ 8.10
Diluted weighted average common shares outstanding 120,000,000.00 111,000,000.00 120,000,000.00 112,000,000.00