Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	$ 0.09	$ (0.63)	$ 0.00
Revenues:
Transaction and clearing fees, net	$ 3,013	$ 1,379	$ 1,185
Market data fees	631	229	147
Listing fees	367	33	0
Other revenues	210	75	31
Total revenues	4,221	1,716	1,363
Transaction-based expenses:
Exchange Fees	359	32	0
Liquidity payments	770	86	0
Revenues, less transaction-based expenses	3,092	1,598	1,363
Operating expenses:
Compensation and benefits	592	302	251
Technology and communication	188	63	46
Professional services	181	54	33
Rent and occupancy	78	39	19
Acquisition-related transaction and integration costs	129	143	19
Selling, general and administrative	143	51	37
Depreciation and amortization	333	156	131
Total operating expenses	1,644	808	536
Operating income	1,448	790	827
Nonoperating Income (Expense) [Abstract]
Interest expense	(96)	(56)	(39)
Other expense, net	55	(230)	2
Total other expense, net	(41)	(286)	(37)
Income before income tax expense	1,407	504	790
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	11	(50)	0
Income tax expense	402	184	228
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	1,005	320	562
Net income	1,016	270	562
Net income attributable to non-controlling interest	(35)	(16)	(10)
Income (Loss) from Continuing Operations Attributable to Noncontrolling Interest	(35)	(16)	(10)
Net income attributable to IntercontinentalExchange Group, Inc.	$ 981	$ 254	$ 552
Earnings per share attributable to IntercontinentalExchange Group, Inc. common shareholders:
Basic	$ 8.60	$ 3.24	$ 7.59
Income (Loss) from Continuing Operations, Per Basic Share	$ 8.50	$ 3.88	$ 7.59
Diluted	$ 8.55	$ 3.21	$ 7.52
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	$ 0.10	$ (0.64)	$ 0.00
Weighted average common shares outstanding:
Basic	114	78	73
Diluted	115	79	73
Income (Loss) from Continuing Operations, Per Diluted Share	$ 8.46	$ 3.84	$ 7.52
Dividend per share	$ 2.60	$ 0.65	$ 0.00