CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income (loss)	$ 526.2	$ (378.1)	$ 317.0
Other comprehensive income (loss):
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 (loss)	710.4	(398.6)	400.3
Equifax Shareholders
Net income (loss)	520.1	(384.1)	310.5
Other comprehensive income (loss):
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 (loss)	703.1	(404.1)	388.0
Noncontrolling Interests
Net income (loss)	6.1	6.0	6.5
Other comprehensive income (loss):
Foreign currency translation adjustment	1.2	(0.5)	5.8
Change in unrecognized prior service cost and actuarial (losses) gains related to our pension and other postretirement benefit plans, net	0.0	0.0	0.0
Change in cumulative gain from cash flow hedging transactions, net	0.0	0.0	0.0
Comprehensive income (loss)	$ 7.3	$ 5.5	$ 12.3