QUARTERLY FINANCIAL DATA (UNAUDITED) (Quarterly Financial Data) (Details) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Operating revenue | $ 838.5 | $ 834.8 | $ 856.7 | $ 832.2 | $ 801.1 | $ 804.1 | $ 811.3 | $ 728.3 | $ 3,362.2 | $ 3,144.9 | $ 2,663.6 |
| Operating income | 190.9 | 152.9 | 264.1 | 216.8 | 203.9 | 212.1 | 225.7 | 176.2 | 824.6 | 817.9 | 693.9 |
| Consolidated net income | 174.4 | 100.5 | 167.6 | 155.4 | 124.8 | 134.9 | 133.0 | 102.4 | 598.0 | 495.1 | 434.8 |
| Net income attributable to Equifax | $ 172.3 | $ 96.3 | $ 165.4 | $ 153.3 | $ 123.0 | $ 132.8 | $ 130.9 | $ 102.1 | $ 587.3 | $ 488.8 | $ 429.1 |
| Basic earnings per share | |||||||||||
| Net income attributable to Equifax (in dollars per share) | $ 1.44 | $ 0.80 | $ 1.37 | $ 1.28 | $ 1.03 | $ 1.11 | $ 1.10 | $ 0.86 | $ 4.89 | $ 4.10 | $ 3.61 |
| Diluted earnings per common share | |||||||||||
| Net income attributable to Equifax (in dollars per share) | $ 1.42 | $ 0.79 | $ 1.36 | $ 1.26 | $ 1.01 | $ 1.09 | $ 1.08 | $ 0.85 | $ 4.83 | $ 4.04 | $ 3.55 |
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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