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Commitments and Contingencies - Phantom (Details) (USD $)
In Millions, unless otherwise specified
Aug. 30, 2014
May 31, 2014
Performance Guarantee
   
Loss Contingencies [Line Items]    
Guarantor Obligations, Current Carrying Value $ 0 $ 0
Financial Standby Letter of Credit
   
Loss Contingencies [Line Items]    
Guarantor Obligations, Current Carrying Value $ 0 $ 0