Quarterly report pursuant to Section 13 or 15(d)

RESTRUCTURING CHARGES - Additional Information (Detail)

v2.4.1.9
RESTRUCTURING CHARGES - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
position
Restructuring Cost and Reserve [Line Items]  
Restructuring and Related Cost, Expected Number of Positions Eliminated 300us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated
Payments on Restructuring Accruals $ 4.1us-gaap_PaymentsForRestructuring
Selling, General and Administrative Expenses  
Restructuring Cost and Reserve [Line Items]  
Restructuring Charges 20.7us-gaap_RestructuringCharges
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
Restructuring Charges Net Of Tax 13.2efx_RestructuringChargesNetOfTax
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
Severance Costs 16.2us-gaap_SeveranceCosts1
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
Business Exit Costs 1.2us-gaap_BusinessExitCosts1
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
Other Restructuring Costs $ 3.3us-gaap_OtherRestructuringCosts
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember