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Derivative Financial Instruments (Details) (Not Designated as Hedging Instrument, USD $)
In Millions, unless otherwise specified
Feb. 28, 2015
Foreign Exchange Forward To Buy Canadian Currency  
Derivative [Line Items]  
Derivative, Notional Amount $ 35invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= schn_ForeignExchangeForwardToBuyCanadianCurrencyMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Foreign Exchange Forward to Sell Canadian Currency  
Derivative [Line Items]  
Derivative, Notional Amount $ 4invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= schn_ForeignExchangeForwardtoSellCanadianCurrencyMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember