| In millions, except per share items | Sep-30-13 | Jun-30-13 | Mar-31-13 | Dec-31-12 | Sep-30-12 | Jun-30-12 | Mar-31-12 | Dec-31-11 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Revenues | | | | | | | | |
| Transaction and clearing fees | 554.0 | | 634.0 | | 570.0 | | 609.0 | |
| Market data | 91.0 | | 83.0 | | 85.0 | | 91.0 | |
| Listing | 113.0 | | 110.0 | | 112.0 | | 110.0 | |
| Technology services | 74.0 | | 80.0 | | 81.0 | | 86.0 | |
| Other revenues | 58.0 | | 56.0 | | 54.0 | | 56.0 | |
| Total revenues | 890.0 | 995.0 | 963.0 | 909.0 | 902.0 | 986.0 | 952.0 | 1,054.0 |
| Total revenues growth | -1.3% | 0.9% | 1.2% | -13.8% | -28.3% | -9.7% | -17.1% | 0.9% |
| Transaction-based expenses: | | | | | | | | |
| Section 31 fees | 61.0 | | 75.0 | | 74.0 | | 66.0 | |
| Liquidity payments, routing and clearing | 255.0 | | 288.0 | | 269.0 | | 285.0 | |
| Total revenues, less transaction-based expenses | 574.0 | | 600.0 | | 559.0 | | 601.0 | |
| |
| Other operating expenses: | | | | | | | | |
| Compensation | 150.0 | | 161.0 | | 145.0 | | 160.0 | |
| Depreciation and amortization | 64.0 | | 62.0 | | 64.0 | | 66.0 | |
| Systems and communications | 40.0 | | 43.0 | | 44.0 | | 45.0 | |
| Professional services | 63.0 | | 69.0 | | 76.0 | | 73.0 | |
| Selling, general and administrative | 55.0 | | 55.0 | | 59.0 | | 61.0 | |
| Merger expenses and exit costs | 24.0 | | 8.0 | | 18.0 | | 31.0 | |
| Total other operating expenses | 396.0 | | 398.0 | | 406.0 | | 436.0 | |
| Operating income | 178.0 | | 202.0 | | 153.0 | | 165.0 | |
| Operating margin | 20.0% | | 21.0% | | 17.0% | | 17.3% | |
| Interest expense | -23.0 | | -28.0 | | -29.0 | | -29.0 | |
| Investment income | | | 1.0 | | 1.0 | | 1.0 | |
| Loss from associates | -2.0 | | -2.0 | -8.0 | -2.0 | | -1.0 | -9.0 |
| Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal | 5.0 | | | | | | | |
| Other income (loss) | 5.0 | | -1.0 | 5.0 | 1.0 | | | |
| Income before income taxes | 158.0 | 195.0 | 172.0 | 45.0 | 124.0 | 165.0 | 136.0 | 93.0 |
| Income tax provision | -24.0 | | 41.0 | | 12.0 | | 45.0 | |
| Tax rate | | 0.0% | 23.8% | 0.0% | 9.7% | 0.0% | 33.1% | 0.0% |
| Net income | 182.0 | | 131.0 | | 112.0 | | 91.0 | |
| Net (income) loss attributable to noncontrolling interest | -4.0 | | -5.0 | -17.0 | -4.0 | | -4.0 | |
| Net income attributable to NYSE Euronext | 178.0 | | 126.0 | | 108.0 | | 87.0 | |
| |
| Basic earnings per share attributable to NYSE Euronext | $0.73 | | $0.52 | | $0.44 | | $0.34 | |
| Diluted earnings per share attributable to NYSE Euronext | $0.73 | | $0.52 | | $0.44 | | $0.34 | |