XML 107 R85.htm IDEA: XBRL DOCUMENT v2.4.1.9
DEFINED BENEFIT PENSION PLANS - Narrative (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jan. 31, 2015
Jan. 30, 2016
Feb. 01, 2014
Defined Benefit Plan Disclosure [Line Items]      
Unrecognized net actuarial losses, net of tax (42)us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax   $ (9)us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax
Maximum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Cash Equivalents, Original Maturity 3 months    
Maximum [Member] | Defined benefit pension plans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Amortization of Net Gains (Losses) 2us-gaap_DefinedBenefitPlanFutureAmortizationOfGainLoss
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_PensionPlansDefinedBenefitMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
UK and Japan Pension Plans [Member] | Minimum [Member] | Defined benefit pension plans      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of plan assets related to U.K. and Japan pension plans 90.00%tru_PercentageOfPlanAssetsRelatingToSpecificPlans
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_PensionPlansDefinedBenefitMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementGeographicalAxis
= tru_UkAndJapanPensionPlansMember
   
Scenario, Forecast [Member] | Defined benefit pension plans      
Defined Benefit Plan Disclosure [Line Items]      
Contribution to pension plan   $ 6us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_PensionPlansDefinedBenefitMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember