DOCUMENT AND ENTITY INFORMATION Document (USD $)	3 Months Ended
	Jun. 30, 2012	Jul. 28, 2012	Oct. 01, 2011
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, 2012
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		42,282,751
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 1,240,169,114