Annual report pursuant to Section 13 and 15(d)

QUARTERLY FINANCIAL DATA (UNAUDITED) - Impact of Change in Accounting Principle (Details)

v3.20.4
QUARTERLY FINANCIAL DATA (UNAUDITED) - Impact of Change in Accounting Principle (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle                      
Consolidated net income (loss) $ 77.7 $ 229.3 $ 100.4 $ 118.8 $ 17.4 $ 85.2 $ 71.0 $ (551.7) $ 526.2 $ (378.1) $ 317.0
Net income attributable to Equifax $ 74.5 $ 228.5 $ 100.2 $ 116.9 $ 15.8 $ 83.8 $ 69.5 $ (553.2) $ 520.1 $ (384.1) $ 310.5
Net income (loss) attributable to Equifax - Basic (in dollars per share) $ 0.61 $ 1.88 $ 0.83 $ 0.96 $ 0.13 $ 0.69 $ 0.58 $ (4.58) $ 4.28 $ (3.18) $ 2.58
Net income (loss) attributable to Equifax - Diluted (in dollars per share) $ 0.61 $ 1.86 $ 0.82 $ 0.95 $ 0.13 $ 0.69 $ 0.57 $ (4.55) $ 4.24 $ (3.15) $ 2.56
As Reported                      
New Accounting Pronouncements or Change in Accounting Principle                      
Consolidated net income (loss) $ 97.7 $ 225.0 $ 96.1 $ 114.5 $ 10.8 $ 82.5 $ 68.3 $ (554.4) $ 533.1 $ (392.8) $ 306.3
Net income attributable to Equifax $ 94.5 $ 224.2 $ 95.9 $ 112.6 $ 9.2 $ 81.1 $ 66.8 $ (555.9) $ 527.0 $ (398.8) $ 299.8
Net income (loss) attributable to Equifax - Basic (in dollars per share) $ 0.77 $ 1.84 $ 0.79 $ 0.93 $ 0.08 $ 0.67 $ 0.55 $ (4.60) $ 4.34 $ (3.30) $ 2.49
Net income (loss) attributable to Equifax - Diluted (in dollars per share) $ 0.77 $ 1.82 $ 0.78 $ 0.92 $ 0.07 $ 0.66 $ 0.55 $ (4.57) $ 4.30 $ (3.27) $ 2.47
Revisions                      
New Accounting Pronouncements or Change in Accounting Principle                      
Consolidated net income (loss) $ (20.0) $ 4.3 $ 4.3 $ 4.3 $ 6.6 $ 2.7 $ 2.7 $ 2.7 $ (6.9) $ 14.7 $ 10.7
Net income attributable to Equifax $ (20.0) $ 4.3 $ 4.3 $ 4.3 $ 6.6 $ 2.7 $ 2.7 $ 2.7 $ (6.9) $ 14.7 $ 10.7
Net income (loss) attributable to Equifax - Basic (in dollars per share) $ (0.16) $ 0.04 $ 0.04 $ 0.03 $ 0.05 $ 0.02 $ 0.03 $ 0.02 $ (0.06) $ 0.12 $ 0.09
Net income (loss) attributable to Equifax - Diluted (in dollars per share) $ (0.16) $ 0.04 $ 0.04 $ 0.03 $ 0.06 $ 0.03 $ 0.02 $ 0.02 $ (0.06) $ 0.12 $ 0.09