Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS (Additional Information) (Detail)

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BENEFIT PLANS (Additional Information) (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions to retirement income plan $ 21.3 $ 17.8 $ 15.6
Accumulated benefit obligation 623.1 697.5  
Accrued incentive compensations 51.8 70.0  
Pension Plans investment return 11.40%    
Defined benefit plan expected return 7.50%    
Difference between actual returns and expected returns rate over five years period 20.00%    
Prohibited additional investing amounts The Plan is prohibited from investing additional amounts in Equifax stock once the market value of stock held by each plan exceeds 10% of the total market value of each plan.    
Stock held by employee benefits trusts, shares 0.6 0.6  
Percentage of Employees Received Lump Sum Payment   64.00%  
Benefits paid   62.6  
Defined Benefit Plan Increase To The Service Benefit   9.00%  
Defined Benefit Plan, Narrative Description of Basis Used to Determine Overall Expected Long-term Rate-of-Return on Assets Assumption The market-related value of assets recognizes the difference between actual returns and expected returns over five years    
Pension Settlement Charge 0 38.7 0
U.S. Retirement Income Plan, or USRIP
      
Defined Benefit Plan Disclosure [Line Items]      
Plans with projected benefit obligations and accumulated benefits benefit obligations in excess of plan's respective assets, projected benefit obligation 580.1 650.5  
Plans with projected benefit obligations and accumulated benefits benefit obligations in excess of plan's respective assets, accumulated benefit obligation 575.5 642.2  
Plans with projected benefit obligations and accumulated benefits benefit obligations in excess of plan's respective assets, fair value of plan assets 511.7 494.1  
Defined Benefit Plan, Expected Return On Plan Assets Percentage 7.50%    
Canadian Retirement Income Plan, or CRIP
      
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions to retirement income plan 2.6 3.7  
Plans with projected benefit obligations and accumulated benefits benefit obligations in excess of plan's respective assets, projected benefit obligation 56.7 66.3  
Plans with projected benefit obligations and accumulated benefits benefit obligations in excess of plan's respective assets, accumulated benefit obligation 47.6 55.3  
Plans with projected benefit obligations and accumulated benefits benefit obligations in excess of plan's respective assets, fair value of plan assets 56.4 53.9  
Pension Plans investment return 13.50%    
Defined Benefit Plan, Expected Return On Plan Assets Percentage 6.75%    
Pre-Medicare Coverage
      
Defined Benefit Plan Disclosure [Line Items]      
Initial annual rate increase in the per capita cost of of covered healthcare benefits 7.00%    
Ultimate annual rate decrease in the per capita cost of of covered healthcare benefits 5.00%    
Health care cost trend an initial 7.0% annual rate of increase in the per capita cost of covered healthcare benefits was assumed for 2014 for pre-Medicare coverage. The rate was assumed to decrease gradually to an ultimate rate of 5.0% by 2020.    
Post-Medicare Coverage
      
Defined Benefit Plan Disclosure [Line Items]      
Initial annual rate increase in the per capita cost of of covered healthcare benefits 7.00%    
Ultimate annual rate decrease in the per capita cost of of covered healthcare benefits 5.00%    
Health care cost trend An initial 7.0% annual rate of increase in the per capita cost of covered healthcare benefits was assumed for 2014 for post-Medicare coverage. The rate was assumed to decrease gradually to an ultimate rate of 5.0% by 2020.    
Trust for Benefit of Employees
      
Defined Benefit Plan Disclosure [Line Items]      
Stock held by employee benefits trusts, shares 0.6 0.6  
Shares of Equifax stock included in Employee Benefit Trusts at cost 5.9 5.9  
Pension Plans Defined Benefit [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions to retirement income plan 6.7 7.6  
Benefits paid $ 41.5 $ 40.7  
Hired Before July 2007
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan Percentage Of Employees Covered 20.00%    
Canadian Plan
      
Defined Benefit Plan Disclosure [Line Items]      
Initial annual rate increase in the per capita cost of of covered healthcare benefits 7.50%    
Ultimate annual rate decrease in the per capita cost of of covered healthcare benefits 5.00%