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COMMITMENTS AND CONTINGENCIES (Details)
In Millions, unless otherwise specified
Mar. 31, 2015
USD ($)
Mar. 31, 2015
JPY (¥)
Loss Contingencies [Line Items]    
Aggregate amount of assessments and disputed duties $ 35.8nus_AggregateAmountOfAssessmentsAndDisputedDuties ¥ 4,300.0nus_AggregateAmountOfAssessmentsAndDisputedDuties