XML 99 R82.htm IDEA: XBRL DOCUMENT
v3.8.0.1

BENEFIT PLANS (Reconciliation of Beginning and Ending Balances for Plan Assets Valued using Significant Unobservable Inputs) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Private Equity |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Roll Forward] |  |
Balance at December 31, 2016 | $ 33.5 | $ 41.9
Return on plan assets: |  |
Unrealized | (1.8) | 0.2
Realized | 1.0 | 1.0
Purchases | 1.0 | 1.7
Sales | (9.6) | (11.3)
Balance at December 31, 2017 | 24.1 | 33.5
Hedge Funds |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Roll Forward] |  |
Balance at December 31, 2016 | 33.7 | 54.0
Return on plan assets: |  |
Unrealized | 1.8 | 0.5
Realized | 0.0 | 0.0
Purchases | 0.0 | 0.0
Sales | (0.5) | (20.8)
Balance at December 31, 2017 | 35.0 | 33.7
Real Assets |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Roll Forward] |  |
Balance at December 31, 2016 | 19.3 | 17.4
Return on plan assets: |  |
Unrealized | 0.1 | 0.7
Realized | (0.1) | 0.1
Purchases | 0.5 | 2.0
Sales | (1.1) | (0.9)
Balance at December 31, 2017 | $ 18.7 | $ 19.3

X
- Definition Defined Benefit Plan Assets With Unobservable Inputs + References No definition available. + Details
Name: | efx_DefinedBenefitPlanAssetsWithUnobservableInputs
Namespace Prefix: | efx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Defined Benefit Plan Assets With Unobservable Inputs Purchases + References No definition available. + Details
Name: | efx_DefinedBenefitPlanAssetsWithUnobservableInputsPurchases
Namespace Prefix: | efx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Defined Benefit Plan Assets With Unobservable Inputs Realized Gain Loss + References No definition available. + Details
Name: | efx_DefinedBenefitPlanAssetsWithUnobservableInputsRealizedGainLoss
Namespace Prefix: | efx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Defined Benefit Plan Assets With Unobservable Inputs Sales + References No definition available. + Details
Name: | efx_DefinedBenefitPlanAssetsWithUnobservableInputsSales
Namespace Prefix: | efx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Defined Benefit Plan Assets with Unobservable Inputs, Unrealized Gain (Loss) + References No definition available. + Details
Name: | efx_DefinedBenefitPlanAssetsWithUnobservableInputsUnrealizedGainLoss
Namespace Prefix: | efx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair Value, Balance Sheet Grouping, Financial Statement Captions [Roll Forward] + References No definition available. + Details
Name: | efx_FairValueBalanceSheetGroupingFinancialStatementCaptionsRollForward
Namespace Prefix: | efx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=efx_PrivateEquitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_HedgeFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_RealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |