IMPACT OF CHANGE IN ACCOUNTING PRINCIPLE ON CURRENT AND PRIOR PERIOD FINANCIAL STATEMENTS (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  | 
| Income Statement | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Other income, net | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
$ 150.2
 | 
$ 33.3
 | 
$ 25.9
 | 
| Consolidated income before income taxes | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
685.2
 | 
(413.8)
 | 
370.4
 | 
| Provision for income taxes | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(159.0)
 | 
35.7
 | 
(53.4)
 | 
| 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 (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 (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
 | 
| Statement of Comprehensive Income | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| 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
 | 
| Foreign currency translation adjustment | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
185.2
 | 
(24.9)
 | 
(218.9)
 | 
| Change in unrecognized prior service cost and actuarial (losses) gains related to our pension and other postretirement benefit plans, net | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(1.1)
 | 
4.3
 | 
302.2
 | 
| Change in cumulative gain from cash flow hedging transactions, net | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.1
 | 
0.1
 | 
0.0
 | 
| Comprehensive income | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
710.4
 | 
(398.6)
 | 
400.3
 | 
| Balance Sheet | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Retained earnings | 
4,185.4
 | 
 
 | 
 
 | 
 
 | 
3,854.6
 | 
 
 | 
 
 | 
 
 | 
4,185.4
 | 
3,854.6
 | 
 
 | 
| Accumulated other comprehensive loss | 
(171.4)
 | 
 
 | 
 
 | 
 
 | 
(354.4)
 | 
 
 | 
 
 | 
 
 | 
(171.4)
 | 
(354.4)
 | 
(334.5)
 | 
| Statement of Cash Flows | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| 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
 | 
| Deferred income taxes | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
66.5
 | 
(82.7)
 | 
1.3
 | 
| Other assets, current and long-term | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
35.8
 | 
(78.8)
 | 
(15.4)
 | 
| Current and long-term liabilities, excluding debt | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
106.9
 | 
527.7
 | 
48.3
 | 
| Cash provided by operating activities | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
946.2
 | 
313.8
 | 
672.2
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
2,622.9
 | 
 
 | 
 
 | 
 
 | 
3,155.6
 | 
2,622.9
 | 
3,155.6
 | 
3,239.0
 | 
| 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
 | 
| Other comprehensive income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
184.2
 | 
(20.4)
 | 
(212.3)
 | 
| Ending Balance | 
3,210.3
 | 
 
 | 
 
 | 
 
 | 
2,622.9
 | 
 
 | 
 
 | 
 
 | 
3,210.3
 | 
2,622.9
 | 
3,155.6
 | 
| Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Foreign currency translation | 
(168.4)
 | 
 
 | 
 
 | 
 
 | 
(352.4)
 | 
 
 | 
 
 | 
 
 | 
(168.4)
 | 
(352.4)
 | 
(328.1)
 | 
| Foreign currency translation | 
(168.5)
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(168.5)
 | 
 
 | 
(328.0)
 | 
| Unrecognized actuarial losses and prior service cost related to our pension and other postretirement benefit plans, net of accumulated tax | 
(2.0)
 | 
 
 | 
 
 | 
 
 | 
(0.9)
 | 
 
 | 
 
 | 
 
 | 
(2.0)
 | 
(0.9)
 | 
(5.2)
 | 
| Unrecognized actuarial losses and prior service cost related to our pension and other postretirement benefit plans, net of accumulated tax | 
(1.9)
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(1.9)
 | 
 
 | 
 
 | 
| Cash flow hedging transactions, net of tax | 
(1.0)
 | 
 
 | 
 
 | 
 
 | 
(1.1)
 | 
 
 | 
 
 | 
 
 | 
(1.0)
 | 
(1.1)
 | 
(1.2)
 | 
| Accumulated other comprehensive loss | 
(171.4)
 | 
 
 | 
 
 | 
 
 | 
(354.4)
 | 
 
 | 
 
 | 
 
 | 
(171.4)
 | 
(354.4)
 | 
(334.5)
 | 
| Accumulated other comprehensive loss | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(334.4)
 | 
| Retained Earnings | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Income Statement | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Consolidated net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
520.1
 | 
(384.1)
 | 
310.5
 | 
| Statement of Comprehensive Income | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
520.1
 | 
(384.1)
 | 
310.5
 | 
| Statement of Cash Flows | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Consolidated net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
520.1
 | 
(384.1)
 | 
310.5
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
3,854.6
 | 
 
 | 
 
 | 
 
 | 
4,425.9
 | 
3,854.6
 | 
4,425.9
 | 
4,600.6
 | 
| Net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
520.1
 | 
(384.1)
 | 
310.5
 | 
| Ending Balance | 
4,185.4
 | 
 
 | 
 
 | 
 
 | 
3,854.6
 | 
 
 | 
 
 | 
 
 | 
4,185.4
 | 
3,854.6
 | 
4,425.9
 | 
| Retained Earnings | Cumulative adjustment from change in accounting principle | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
 
 | 
0.0
 | 
(298.4)
 | 
| Ending Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
| Accumulated Other Comprehensive Loss | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
(354.4)
 | 
 
 | 
 
 | 
 
 | 
(334.5)
 | 
(354.4)
 | 
(334.5)
 | 
(412.0)
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(334.4)
 | 
 
 | 
(334.4)
 | 
 
 | 
| Other comprehensive income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
183.0
 | 
(19.9)
 | 
(218.1)
 | 
| Other comprehensive income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(20.0)
 | 
(218.0)
 | 
| Ending Balance | 
(171.4)
 | 
 
 | 
 
 | 
 
 | 
(354.4)
 | 
 
 | 
 
 | 
 
 | 
(171.4)
 | 
(354.4)
 | 
(334.5)
 | 
| Ending Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(334.4)
 | 
| Accumulated Other Comprehensive Loss | Cumulative adjustment from change in accounting principle | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
 
 | 
0.0
 | 
302.6
 | 
| Ending Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
| Equifax Shareholders | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Income Statement | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Consolidated net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
520.1
 | 
(384.1)
 | 
310.5
 | 
| Statement of Comprehensive Income | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
520.1
 | 
(384.1)
 | 
310.5
 | 
| Foreign currency translation adjustment | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
184.0
 | 
(24.4)
 | 
(224.7)
 | 
| Change in unrecognized prior service cost and actuarial (losses) gains related to our pension and other postretirement benefit plans, net | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(1.1)
 | 
4.3
 | 
302.2
 | 
| Change in cumulative gain from cash flow hedging transactions, net | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.1
 | 
0.1
 | 
0.0
 | 
| Comprehensive income | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
703.1
 | 
(404.1)
 | 
388.0
 | 
| Statement of Cash Flows | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Consolidated net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
520.1
 | 
(384.1)
 | 
310.5
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
520.1
 | 
(384.1)
 | 
310.5
 | 
| As Reported | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Income Statement | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Other income, net | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
159.4
 | 
14.1
 | 
11.8
 | 
| Consolidated income before income taxes | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
694.4
 | 
(433.0)
 | 
356.3
 | 
| Provision for income taxes | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(161.3)
 | 
40.2
 | 
(50.0)
 | 
| 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 (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 (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
 | 
| Statement of Comprehensive Income | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| 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
 | 
| Balance Sheet | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Retained earnings | 
4,469.5
 | 
 
 | 
 
 | 
 
 | 
4,131.8
 | 
 
 | 
 
 | 
 
 | 
4,469.5
 | 
4,131.8
 | 
 
 | 
| Accumulated other comprehensive loss | 
(455.5)
 | 
 
 | 
 
 | 
 
 | 
(631.6)
 | 
 
 | 
 
 | 
 
 | 
(455.5)
 | 
(631.6)
 | 
(626.3)
 | 
| Statement of Cash Flows | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| 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
 | 
| Deferred income taxes | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
68.6
 | 
(87.2)
 | 
(2.3)
 | 
| Current and long-term liabilities, excluding debt | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
97.9
 | 
546.9
 | 
62.6
 | 
| Cash provided by operating activities | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
946.2
 | 
313.8
 | 
672.2
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| 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
 | 
| Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Foreign currency translation | 
(168.5)
 | 
 
 | 
 
 | 
 
 | 
(352.4)
 | 
 
 | 
 
 | 
 
 | 
(168.5)
 | 
(352.4)
 | 
(328.0)
 | 
| Unrecognized actuarial losses and prior service cost related to our pension and other postretirement benefit plans, net of accumulated tax | 
(286.0)
 | 
 
 | 
 
 | 
 
 | 
(278.1)
 | 
 
 | 
 
 | 
 
 | 
(286.0)
 | 
(278.1)
 | 
(297.1)
 | 
| Cash flow hedging transactions, net of tax | 
(1.0)
 | 
 
 | 
 
 | 
 
 | 
(1.1)
 | 
 
 | 
 
 | 
 
 | 
(1.0)
 | 
(1.1)
 | 
(1.2)
 | 
| Accumulated other comprehensive loss | 
(455.5)
 | 
 
 | 
 
 | 
 
 | 
(631.6)
 | 
 
 | 
 
 | 
 
 | 
(455.5)
 | 
(631.6)
 | 
(626.3)
 | 
| As Reported | Retained Earnings | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Income Statement | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Consolidated net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
527.0
 | 
(398.8)
 | 
299.8
 | 
| Statement of Comprehensive Income | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
527.0
 | 
(398.8)
 | 
299.8
 | 
| Statement of Cash Flows | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Consolidated net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
527.0
 | 
(398.8)
 | 
299.8
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
4,131.8
 | 
 
 | 
 
 | 
 
 | 
4,717.8
 | 
4,131.8
 | 
4,717.8
 | 
4,600.6
 | 
| Net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
527.0
 | 
(398.8)
 | 
299.8
 | 
| Ending Balance | 
4,469.5
 | 
 
 | 
 
 | 
 
 | 
4,131.8
 | 
 
 | 
 
 | 
 
 | 
4,469.5
 | 
4,131.8
 | 
4,717.8
 | 
| As Reported | Retained Earnings | Cumulative adjustment from change in accounting principle | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
 
 | 
0.0
 | 
4.2
 | 
| Ending Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
| As Reported | Accumulated Other Comprehensive Loss | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
(631.6)
 | 
 
 | 
 
 | 
 
 | 
(626.3)
 | 
(631.6)
 | 
(626.3)
 | 
(412.0)
 | 
| Other comprehensive income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
176.1
 | 
(5.3)
 | 
(207.3)
 | 
| Ending Balance | 
(455.5)
 | 
 
 | 
 
 | 
 
 | 
(631.6)
 | 
 
 | 
 
 | 
 
 | 
(455.5)
 | 
(631.6)
 | 
(626.3)
 | 
| As Reported | Accumulated Other Comprehensive Loss | Cumulative adjustment from change in accounting principle | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
 
 | 
0.0
 | 
0.0
 | 
| Ending Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
| As Reported | Equifax Shareholders | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Income Statement | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Consolidated net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
527.0
 | 
(398.8)
 | 
299.8
 | 
| Statement of Comprehensive Income | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
527.0
 | 
(398.8)
 | 
299.8
 | 
| Foreign currency translation adjustment | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
184.0
 | 
(24.4)
 | 
(224.7)
 | 
| Change in unrecognized prior service cost and actuarial (losses) gains related to our pension and other postretirement benefit plans, net | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(8.0)
 | 
19.0
 | 
10.4
 | 
| Change in cumulative gain from cash flow hedging transactions, net | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.1
 | 
0.1
 | 
0.0
 | 
| Comprehensive income | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
703.1
 | 
(404.1)
 | 
85.5
 | 
| Statement of Cash Flows | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Consolidated net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
527.0
 | 
(398.8)
 | 
299.8
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
527.0
 | 
(398.8)
 | 
299.8
 | 
| Revisions | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Income Statement | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Other income, net | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(9.2)
 | 
19.2
 | 
14.1
 | 
| Consolidated income before income taxes | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(9.2)
 | 
19.2
 | 
14.1
 | 
| Provision for income taxes | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
2.3
 | 
(4.5)
 | 
(3.4)
 | 
| 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 (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 (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
 | 
| Statement of Comprehensive Income | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| 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
 | 
| Balance Sheet | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Retained earnings | 
(284.1)
 | 
 
 | 
 
 | 
 
 | 
(277.2)
 | 
 
 | 
 
 | 
 
 | 
(284.1)
 | 
(277.2)
 | 
 
 | 
| Accumulated other comprehensive loss | 
284.1
 | 
 
 | 
 
 | 
 
 | 
277.2
 | 
 
 | 
 
 | 
 
 | 
284.1
 | 
277.2
 | 
291.9
 | 
| Statement of Cash Flows | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| 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
 | 
| Deferred income taxes | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(2.1)
 | 
4.5
 | 
3.6
 | 
| Current and long-term liabilities, excluding debt | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
9.0
 | 
(19.2)
 | 
(14.3)
 | 
| Cash provided by operating activities | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
0.0
 | 
0.0
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
(0.4)
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(0.4)
 | 
 
 | 
4.2
 | 
| 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
 | 
| Ending Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
(0.4)
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(0.4)
 | 
 
 | 
| Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Foreign currency translation | 
0.0
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
0.0
 | 
0.0
 | 
| Unrecognized actuarial losses and prior service cost related to our pension and other postretirement benefit plans, net of accumulated tax | 
284.1
 | 
 
 | 
 
 | 
 
 | 
277.2
 | 
 
 | 
 
 | 
 
 | 
284.1
 | 
277.2
 | 
291.9
 | 
| Cash flow hedging transactions, net of tax | 
0.0
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
0.0
 | 
0.0
 | 
| Accumulated other comprehensive loss | 
284.1
 | 
 
 | 
 
 | 
 
 | 
277.2
 | 
 
 | 
 
 | 
 
 | 
284.1
 | 
277.2
 | 
291.9
 | 
| Revisions | Retained Earnings | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Income Statement | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Consolidated net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(6.9)
 | 
14.7
 | 
10.7
 | 
| Statement of Comprehensive Income | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(6.9)
 | 
14.7
 | 
10.7
 | 
| Statement of Cash Flows | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Consolidated net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(6.9)
 | 
14.7
 | 
10.7
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
(0.4)
 | 
 
 | 
 
 | 
 
 | 
(291.9)
 | 
(0.4)
 | 
(291.9)
 | 
(298.4)
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
(277.2)
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(277.2)
 | 
 
 | 
0.0
 | 
| Net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(6.9)
 | 
14.7
 | 
10.7
 | 
| Ending Balance | 
(284.1)
 | 
 
 | 
 
 | 
 
 | 
(0.4)
 | 
 
 | 
 
 | 
 
 | 
(284.1)
 | 
(0.4)
 | 
(291.9)
 | 
| Ending Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
(277.2)
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(277.2)
 | 
 
 | 
| Revisions | Retained Earnings | Cumulative adjustment from change in accounting principle | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
 
 | 
0.0
 | 
(302.6)
 | 
| Ending Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
| Revisions | Accumulated Other Comprehensive Loss | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
$ 277.2
 | 
 
 | 
 
 | 
 
 | 
291.9
 | 
277.2
 | 
291.9
 | 
302.6
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
| Other comprehensive income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
6.9
 | 
(14.7)
 | 
 
 | 
| Other comprehensive income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(10.7)
 | 
| Ending Balance | 
$ 284.1
 | 
 
 | 
 
 | 
 
 | 
$ 277.2
 | 
 
 | 
 
 | 
 
 | 
284.1
 | 
277.2
 | 
291.9
 | 
| Revisions | Accumulated Other Comprehensive Loss | Cumulative adjustment from change in accounting principle | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Beginning Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
$ 0.0
 | 
 
 | 
0.0
 | 
302.6
 | 
| Ending Balance | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
| Revisions | Equifax Shareholders | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Income Statement | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Consolidated net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(6.9)
 | 
14.7
 | 
10.7
 | 
| Statement of Comprehensive Income | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(6.9)
 | 
14.7
 | 
10.7
 | 
| Foreign currency translation adjustment | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
0.0
 | 
0.0
 | 
| Change in unrecognized prior service cost and actuarial (losses) gains related to our pension and other postretirement benefit plans, net | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
6.9
 | 
(14.7)
 | 
291.8
 | 
| Change in cumulative gain from cash flow hedging transactions, net | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
0.0
 | 
0.0
 | 
| Comprehensive income | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
0.0
 | 
0.0
 | 
302.5
 | 
| Statement of Cash Flows | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Consolidated net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
(6.9)
 | 
14.7
 | 
10.7
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income (loss) | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
$ (6.9)
 | 
$ 14.7
 | 
$ 10.7
 |