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DOCUMENT AND ENTITY INFORMATION Document (USD $)
3 Months Ended
Jun. 30, 2013
Jul. 27, 2013
Sep. 29, 2012
Entity Information [Line Items]      
Entity Registrant Name PLANTRONICS INC /CA/    
Entity Central Index Key 0000914025    
Current Fiscal Year End Date --03-31    
Entity Filer Category Large Accelerated Filer    
Document Type 10-Q    
Document Period End Date Jun. 30, 2013    
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus Q1    
Amendment Flag       
Entity Common Stock, Shares Outstanding   43,856,328  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 1,492,167,700