| Document and Entity Information | 7 Months Ended | |
| Sep. 30, 2013 | Nov. 01, 2013 | |
| Document Information [Line Items] | ' | ' |
| Document Type | '10-Q | ' |
| Amendment Flag | 'false | ' |
| Document Period End Date | 30-Sep-13 | ' |
| Document Fiscal Year Focus | '2013 | ' |
| Document Fiscal Period Focus | 'Q3 | ' |
| Entity Registrant Name | 'IntercontinentalExchange Group, Inc. | ' |
| Entity Central Index Key | '0001571949 | ' |
| Current Fiscal Year End Date | '--12-31 | ' |
| Entity Filer Category | 'Non-accelerated Filer | ' |
| Entity Common Stock, Shares Outstanding | ' | 1 |
| Consolidated Balance Sheet (USD $) | Sep. 30, 2013 |
| Current assets: | ' |
| Cash | $10 |
| Total current assets | 10 |
| Noncurrent assets: | ' |
| Debt issuance costs | 1,329,000 |
| Total noncurrent assets | 1,329,000 |
| Total assets | 1,329,010 |
| Current liabilities: | ' |
| Due to affiliate | 1,329,000 |
| Total current liabilities | 1,329,000 |
| Total liabilities | 1,329,000 |
| Commitments and contingencies | ' |
| Shareholders' equity: | ' |
| Common stock, $0.01 par value; 100 shares authorized; 1 share issued and outstanding | 1 |
| Additional paid-in capital | 9 |
| Retained earnings | ' |
| Accumulated other comprehensive income | ' |
| Total equity | 10 |
| Total liabilities and equity | $1,329,010 |
| Consolidated Balance Sheet (Parenthetical) (USD $) | Sep. 30, 2013 |
| Common stock, par value | $0.01 |
| Common stock, shares authorized | 100 |
| Common stock, share issued | 1 |
| Common stock, share outstanding | 1 |
| Consolidated Statements of Operations (USD $) | 3 Months Ended | 7 Months Ended |
| Sep. 30, 2013 | Sep. 30, 2013 | |
| Revenues: | ' | ' |
| Total revenues | ' | ' |
| Expenses: | ' | ' |
| Total expenses | ' | ' |
| Income before income taxes | ' | ' |
| Income tax expense | ' | ' |
| Net income | ' | ' |
| Earnings per share: | ' | ' |
| Basic | ' | ' |
| Weighted average common shares outstanding: | ' | ' |
| Basic | ' | ' |
| Consolidated Statements of Comprehensive Income (USD $) | 3 Months Ended | 7 Months Ended |
| Sep. 30, 2013 | Sep. 30, 2013 | |
| Net income | ' | ' |
| Other comprehensive income, net of tax: | ' | ' |
| Other comprehensive income | ' | ' |
| Comprehensive income | ' | ' |
| Consolidated Statement of Cash Flows (USD $) | 7 Months Ended |
| Sep. 30, 2013 | |
| Operating activities | ' |
| Net income | ' |
| Changes in assets and liabilities: | ' |
| Due to affiliate | 1,329,000 |
| Total adjustments | 1,329,000 |
| Net cash provided by operating activities | 1,329,000 |
| Investing activities | ' |
| Net cash provided by investing activities | ' |
| Financing activities | ' |
| Proceeds from ICE to capitalize Company | 10 |
| Issuance costs of debt facility | -1,329,000 |
| Net cash used in financing activities | -1,328,990 |
| Net increase in cash | 10 |
| Cash, end of period | $10 |
| Organization | 7 Months Ended |
| Sep. 30, 2013 | |
| Organization | ' |
| 1. Organization | |
| IntercontinentalExchange Group, Inc. (“ICE Group” or the “Company”), is a Delaware corporation, and in connection with the pending acquisition discussed below, will become the holding company of IntercontinentalExchange, Inc. (“ICE”), also a Delaware corporation, and NYSE Euronext Holdings, LLC, a Delaware limited liability company and the subsidiary that will survive the merger with NYSE Euronext (“NYSE Euronext”). ICE Group was organized on March 6, 2013, for the purpose of effecting ICE’s pending acquisition of NYSE Euronext (“the acquisition”), as described in the joint proxy statement/prospectus of ICE Group filed with the SEC on April 30, 2013 (File No. 333-187402) (the “Proxy Statement”) and discussed below. In connection with the pending acquisition, ICE and NYSE Euronext will become wholly-owned subsidiaries of ICE Group and ICE Group, as the successor to ICE, will become a publicly traded holding company. ICE and NYSE Euronext stockholders will become the holders of shares of ICE Group common stock trading under the ticker symbol “ICE” on the New York Stock Exchange. As of September 30, 2013, ICE Group was a wholly-owned subsidiary of ICE and ICE Group had not commenced operations, had no significant assets or liabilities, and had not carried on any activities other than those incidental to its formation and the matters contemplated by the pending acquisition. | |
| ICE is a leading operator of regulated global markets and clearing houses, including futures exchanges, over-the counter markets, derivatives clearing houses and post-trade services. ICE operates these global marketplaces for trading and clearing of a broad array of energy, environmental and agricultural commodities, credit derivatives, equity index and currency contracts. NYSE Euronext is a leading operator of financial markets and provider of trading technologies. NYSE Euronext is a holding company that, through its subsidiaries, operates the following securities exchanges: the New York Stock Exchange, NYSE Arca, Inc. and NYSE MKT LLC in the United States and the European-based exchanges that comprise Euronext N.V. — the Paris, Amsterdam, Brussels and Lisbon stock exchanges, as well as the NYSE Liffe derivatives markets in London, Paris, Amsterdam, Brussels and Lisbon. | |
| Pending NYSE Euronext Acquisition | |
| In December 2012, ICE announced an agreement to acquire NYSE Euronext in a stock and cash transaction. Following successive merger transactions, ICE and NYSE Euronext will become wholly-owned subsidiaries of ICE Group. The transaction is currently valued at approximately $10.9 billion, based on the closing price of ICE stock on November 1, 2013. |
| Basis of presentation | 7 Months Ended |
| Sep. 30, 2013 | |
| Basis of presentation | ' |
| 2. Basis of presentation | |
| The accompanying unaudited consolidated financial statements have been prepared by the Company in accordance with U.S. generally accepted accounting principles pursuant to the rules and regulations of the Securities and Exchange Commission regarding interim financial reporting. Accordingly, the unaudited consolidated financial statements do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements and should be read in conjunction with the Proxy Statement. The accompanying unaudited consolidated financial statements reflect all adjustments that are, in the opinion of the Company’s management, necessary for a fair presentation of results for the interim periods presented. These adjustments are of a normal recurring nature. | |
| Preparing financial statements requires management to make estimates and assumptions that affect the amounts that are reported in the consolidated financial statements and accompanying disclosures. Although these estimates are based on management’s best knowledge of current events and actions that the Company may undertake in the future, actual results may be different from these estimates. The results of operations for the period from March 6, 2013 (the date of incorporation) to September 30, 2013 and for the three months ended September 30, 2013 are not necessarily indicative of the results to be expected for any future period or the full fiscal year. | |
| The accompanying unaudited consolidated financial statements include the accounts of the Company and its wholly-owned and controlled subsidiaries. All intercompany balances and transactions between the Company and its wholly-owned and majority-owned subsidiaries have been eliminated in consolidation. |
| Public Senior Notes | 7 Months Ended |
| Sep. 30, 2013 | |
| Public Senior Notes | ' |
| 3. Public Senior Notes | |
| On October 8, 2013, the Company issued $600.0 million principal amount of 2.50% Senior Notes due 2018 (the “2018 Senior Notes”) and $800.0 million principal amount of 4.00% Senior Notes due 2023 (the “2023 Senior Notes”, together with the 2018 Senior Notes, the “Public Senior Notes”). The 2018 Senior Notes will mature on October 15, 2018, and the 2023 Senior Notes will mature on October 15, 2023. Interest on the Public Senior Notes will be payable on April 15 and October 15 of each year, beginning on April 15, 2014. | |
| ICE (which at the closing of the pending NYSE Euronext acquisition, will become a subsidiary of the Company through a series of merger transactions), intends to use the proceeds from the Public Senior Notes offering, together with cash on hand and $400 million of borrowings on October 31, 2013 under its revolving credit facility, to fund the $2.7 billion cash portion of the purchase price of the pending acquisition of NYSE Euronext (Note 1). | |
| The Public Senior Notes contain affirmative and negative covenants, including, but not limited to, certain redemption rights, reporting obligations, limitations on liens and indebtedness, limitations on certain mergers, sales, dispositions and lease-back transactions. | |
| In connection with the Public Senior Notes offering, the Company incurred $1.3 million in debt issuance costs during the three months ended September 30, 2013. These costs were capitalized as noncurrent assets and will be recognized over the life of the related debt. The costs were recorded as “due to affiliate” in the accompanying consolidated balance sheet as they were paid by and are reimbursable to ICE. |
| Subsequent Events | 7 Months Ended |
| Sep. 30, 2013 | |
| Subsequent Events | ' |
| 4. Subsequent Events | |
| The Company has evaluated subsequent events and determined that no events or transactions met the definition of a subsequent event for purposes of recognition or disclosure in the accompanying consolidated financial statements, except the events disclosed in Notes 1 and 3. |
| Organization - Additional information (Detail) (Subsequent Event, NYSE Euronext Acquisition, USD $) | 1 Months Ended |
| In Billions, unless otherwise specified | Nov. 01, 2013 |
| Subsequent Event | NYSE Euronext Acquisition | ' |
| Organization and Nature of Operations [Line Items] | ' |
| Pending acquisition transaction value | $10.90 |
| Public Senior Notes - Additional Information (Detail) (USD $) | 3 Months Ended | 7 Months Ended | 1 Months Ended | |||
| Sep. 30, 2013 | Sep. 30, 2013 | Oct. 31, 2013 | Nov. 01, 2013 | Oct. 08, 2013 | Oct. 08, 2013 | |
| Subsequent Event | Subsequent Event | 2018 Senior Notes | 2023 Senior Notes | |||
| Revolving Credit Facility | NYSE Euronext Acquisition | Subsequent Event | Subsequent Event | |||
| Debt Instrument [Line Items] | ' | ' | ' | ' | ' | ' |
| Principal amount of senior notes issued | ' | ' | ' | ' | $600,000,000 | $800,000,000 |
| Senior notes, interest rate | ' | ' | ' | ' | 2.50% | 4.00% |
| Borrowings under credit facility | ' | ' | 400,000,000 | ' | ' | ' |
| Cash portion of purchase price of pending acquisition | ' | ' | ' | 2,700,000,000 | ' | ' |
| Debt issuance costs | $1,300,000 | $1,329,000 | ' | ' | ' | ' |
