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Fair Value Measurements, Fair Value Hierarchy (Details) (Fair Value, Measurements, Recurring [Member], USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Fair Value, Measurements, Recurring [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Derivative Assets (Liabilities), at Fair Value, Net $ 0