| Cover | Oct. 29, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 29, 2020 |
| Entity Registrant Name | PLANTRONICS INC |
| Entity Central Index Key | 0000914025 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 1-12696 |
| Entity Tax Identification Number | 77-0207692 |
| Entity Address, Address Line One | 345 Encinal Street |
| Entity Address, City or Town | Santa Cruz |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 95060 |
| City Area Code | 831 |
| Local Phone Number | 426-5858 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | COMMON STOCK, $0.01 PAR VALUE |
| Trading Symbol | PLT |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
