DOCUMENT AND ENTITY INFORMATION Document - shares	6 Months Ended
	Sep. 30, 2015	Nov. 04, 2015
Document and Entity Information [Abstract]
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	Sep. 30, 2015
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		33,681,183
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes