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DEBT (Additional Information) (Detail) (USD $)
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12 Months Ended |
1 Months Ended |
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Jun. 28, 2007
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Dec. 17, 2012
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May 01, 2014
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Dec. 01, 2014
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| Debt Instrument [Line Items] |
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| Commercial Paper Maximum Borrowing Capacity |
$ 750,000,000.0efx_CommercialPaperMaximumBorrowingCapacity
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| Long term debt |
1,527,900,000us-gaap_LongTermDebt
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1,438,100,000us-gaap_LongTermDebt
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| Cash paid for interest, net of capitalized interest |
67,900,000us-gaap_InterestPaidNet
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67,800,000us-gaap_InterestPaidNet
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53,000,000us-gaap_InterestPaidNet
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| Maximum |
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| Debt Instrument [Line Items] |
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| Commercial paper, maturity date |
397 days
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| Minimum |
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| Debt Instrument [Line Items] |
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| Commercial paper, maturity date |
1 day
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| Notes, 7.34%, due in installments through May 2014 |
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| Debt Instrument [Line Items] |
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| Long term debt |
0us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesSevenPointThreeFourPercentDueInInstallmentsThroughMayTwentyFourteenMember
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15,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesSevenPointThreeFourPercentDueInInstallmentsThroughMayTwentyFourteenMember
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| Long term debt, interest rate |
7.34%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_NotesSevenPointThreeFourPercentDueInInstallmentsThroughMayTwentyFourteenMember
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7.34%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_NotesSevenPointThreeFourPercentDueInInstallmentsThroughMayTwentyFourteenMember
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| Notes, 4.45%, due December 2014 |
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| Debt Instrument [Line Items] |
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| Long term debt |
0us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesFourPointFourFivePercentDueDecemberTwentyFourteenMember
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275,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesFourPointFourFivePercentDueDecemberTwentyFourteenMember
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| Long term debt, interest rate |
4.45%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_NotesFourPointFourFivePercentDueDecemberTwentyFourteenMember
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4.45%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_NotesFourPointFourFivePercentDueDecemberTwentyFourteenMember
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| Notes, 6.30%, due July 2017 |
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| Debt Instrument [Line Items] |
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| Long term debt |
272,500,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesSixPointThreeZeroPercentDueJulyTwentySeventeenMember
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272,500,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesSixPointThreeZeroPercentDueJulyTwentySeventeenMember
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| Long term debt, interest rate |
6.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_NotesSixPointThreeZeroPercentDueJulyTwentySeventeenMember
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6.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_NotesSixPointThreeZeroPercentDueJulyTwentySeventeenMember
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| Notes, 7.00%, due July 2037 |
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| Debt Instrument [Line Items] |
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| Long term debt |
250,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesSevenPointZeroZeroPercentDueJulyTwentyThirtySevenMember
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250,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesSevenPointZeroZeroPercentDueJulyTwentyThirtySevenMember
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| Long term debt, interest rate |
7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_NotesSevenPointZeroZeroPercentDueJulyTwentyThirtySevenMember
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7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_NotesSevenPointZeroZeroPercentDueJulyTwentyThirtySevenMember
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| Notes, 3.30%, due Dec 2022 |
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| Debt Instrument [Line Items] |
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| Long term debt |
500,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesThreePointThreeZeroDueDecemberTwoThousandTwentyTwoMember
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500,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesThreePointThreeZeroDueDecemberTwoThousandTwentyTwoMember
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| Long term debt, interest rate |
3.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_NotesThreePointThreeZeroDueDecemberTwoThousandTwentyTwoMember
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3.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_NotesThreePointThreeZeroDueDecemberTwoThousandTwentyTwoMember
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| Debentures, 6.90%, due July 2028 |
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| Debt Instrument [Line Items] |
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| Long term debt |
125,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_DebenturesSixPointNineZeroPercentDueJulyTwentyTwoEightMember
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125,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_DebenturesSixPointNineZeroPercentDueJulyTwentyTwoEightMember
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| Long term debt, interest rate |
6.90%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_DebenturesSixPointNineZeroPercentDueJulyTwentyTwoEightMember
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6.90%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_DebenturesSixPointNineZeroPercentDueJulyTwentyTwoEightMember
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| Revolving Credit Facility |
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| Debt Instrument [Line Items] |
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| Commercial Paper Maximum Borrowing Capacity |
750,000,000.0efx_CommercialPaperMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
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| Line Of Credit Facility Potential Maximum Borrowing Capacity |
1,000,000,000.0efx_LineOfCreditFacilityPotentialMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
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| Credit facility expiration date |
Dec. 31, 2017
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| Credit facility covenants compliance |
The financial covenants require us to maintain a maximum leverage ratio, defined as consolidated funded debt divided by consolidated EBITDA (as set forth in the Senior Credit Facility) for the preceding four quarters, of not more than 3.5 to 1.0. Compliance with this financial covenant is tested quarterly. The non-financial covenants include limitations on liens, subsidiary debt, mergers, liquidations, asset dispositions and acquisitions. As of December 31, 2014, we were in compliance with our covenants under the Senior Credit Facility.
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| Maximum leverage ratio |
3.5efx_DebtInstrumentCovenantLeverageRatioMaximum
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
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| Credit facility, available for borrowings |
368,800,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
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| Borrowings outstanding |
0us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
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| Letter of Credit |
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| Debt Instrument [Line Items] |
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| Long term debt |
1,500,000us-gaap_LongTermDebt
/ us-gaap_CreditFacilityAxis
= us-gaap_LetterOfCreditMember
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| Senior Notes | Notes, 7.34%, due in installments through May 2014 |
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| Debt Instrument [Line Items] |
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| Long term debt |
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15,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesSevenPointThreeFourPercentDueInInstallmentsThroughMayTwentyFourteenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
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| Senior Notes | Notes, 4.45%, due December 2014 |
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| Debt Instrument [Line Items] |
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| Long term debt |
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275,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesFourPointFourFivePercentDueDecemberTwentyFourteenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
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| Senior Notes | Notes, 6.30%, due July 2017 |
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| Debt Instrument [Line Items] |
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| Long term debt |
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300,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesSixPointThreeZeroPercentDueJulyTwentySeventeenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
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| Long term debt, interest rate |
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6.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_NotesSixPointThreeZeroPercentDueJulyTwentySeventeenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
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| Debt instrument, maturity term |
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10 years
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| Senior Notes | Notes, 7.00%, due July 2037 |
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| Debt Instrument [Line Items] |
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| Long term debt |
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250,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesSevenPointZeroZeroPercentDueJulyTwentyThirtySevenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
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| Long term debt, interest rate |
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7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_NotesSevenPointZeroZeroPercentDueJulyTwentyThirtySevenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
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| Debt instrument, maturity term |
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30 years
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| Senior Notes | Notes, 3.30%, due Dec 2022 |
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| Debt Instrument [Line Items] |
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| Long term debt |
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$ 500,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= efx_NotesThreePointThreeZeroDueDecemberTwoThousandTwentyTwoMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
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| Long term debt, interest rate |
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3.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= efx_NotesThreePointThreeZeroDueDecemberTwoThousandTwentyTwoMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
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| Debt instrument, maturity term |
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10 years
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