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Long Term Debt - Guarantees (Narrative) (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Surety Bond [Member]  
Guarantee Obligations [Line Items]  
Gurantees Obligations $ 45.9us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_GuaranteeObligationsByNatureAxis
= us-gaap_SuretyBondMember
Commercial standby letters of credit [Member]  
Guarantee Obligations [Line Items]  
Gurantees Obligations 115.5us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_GuaranteeObligationsByNatureAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
Bank Gurantees [Member]  
Guarantee Obligations [Line Items]  
Gurantees Obligations 49.5us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_GuaranteeObligationsByNatureAxis
= us-gaap_FinancialGuaranteeMember
Bank Gurantees Collaterized [Member]  
Guarantee Obligations [Line Items]  
Gurantees Obligations $ 12.4us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_GuaranteeObligationsByNatureAxis
= cik0000739708_BankGuranteesCollaterizedMember