BASIS OF PRESENTATION	9 Months Ended
Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION In the opinion of management, the accompanying unaudited condensed consolidated financial statements ("financial statements") of Plantronics, Inc. ("Plantronics" or "the Company") have been prepared on a basis materially consistent with the Company's March 31, 2017 audited consolidated financial statements and include all adjustments, consisting of normal recurring adjustments, necessary to fairly state the information set forth herein. Certain information and footnote disclosures normally included in financial statements prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") applicable to interim financial information and in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. The financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended March 31, 2017, which was filed with the SEC on May 10, 2017. The results of operations for the interim period ended December 31, 2017 are not necessarily indicative of the results to be expected for the entire fiscal year or any future period. The financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated. The Company’s fiscal year ends on the Saturday closest to the last day of March. The Company’s current and prior fiscal years end on March 31, 2018 and April 1, 2017, respectively, and both consist of 52 weeks. The Company’s results of operations for the three and nine months ended December 30, 2017 and December 31, 2016 both contain 13 weeks. For purposes of presentation, the Company has indicated its accounting year as ending on March 31 and its interim quarterly periods as ending on the applicable calendar month end. Certain immaterial reclassifications to our previously reported financial information have been made to conform to the current period presentation. In addition, refer to Note 2, Recent Accounting Pronouncements, for details regarding reclassifications made in our condensed consolidated statements of cash flows pursuant to the adoption of new share-based payment accounting guidance in the first quarter of Fiscal Year 2018. Earnings per common share: The Company has a share-based compensation plan under which employees, non-employee directors, and consultants may be granted share-based payment awards, including shares of restricted stock on which non-forfeitable dividends are paid on unvested shares. As such, shares of restricted stock are considered participating securities under the two-class method of calculating earnings per share. Historically, the two-class method of calculating earnings per share did not have a material impact on the Company's earnings per share calculation under the treasury stock method. Beginning in the second quarter of Fiscal Year 2018, the Company applied the two-class method of calculating earnings per share because the ratio of participating securities to the weighted average number of common shares outstanding has increased as compared to the historical average, and this dilution will continue if the Company continues to repurchase its common stock at current levels. During periods of net loss, no effect is given to participating securities since they do not share in the losses of the Company; therefore, the treasury stock method was used to calculate earnings per common share for the three and nine months ended December 31, 2017. For further details refer to Note 14, Computation of Earnings Per Common Share. Immaterial Out-of-Period Correction: During the first quarter of Fiscal Year 2018, the Company recognized an out-of-period correction to its Fiscal Year 2017 geographic mix of taxable income, which resulted in an overstatement of Fiscal Year 2017 income tax expense by $2.8 million. The Company's correction, recognized in the quarter ended June 30, 2017, resulted in a $2.8 million benefit to income tax expense. The Company assessed the materiality of this error and concluded it was not material to Fiscal Year 2017 and is not expected to be material to the full Fiscal Year 2018.

BASIS OF PRESENTATION

In the opinion of management, the accompanying unaudited condensed consolidated financial statements ("financial statements") of Plantronics, Inc. ("Plantronics" or "the Company") have been prepared on a basis materially consistent with the Company's March 31, 2017 audited consolidated financial statements and include all adjustments, consisting of normal recurring adjustments, necessary to fairly state the information set forth herein. Certain information and footnote disclosures normally included in financial statements prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") applicable to interim financial information and in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. The financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended March 31, 2017, which was filed with the SEC on May 10, 2017. The results of operations for the interim period ended December 31, 2017 are not necessarily indicative of the results to be expected for the entire fiscal year or any future period.

The financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated.

The Company’s fiscal year ends on the Saturday closest to the last day of March. The Company’s current and prior fiscal years end on March 31, 2018 and April 1, 2017, respectively, and both consist of 52 weeks. The Company’s results of operations for the three and nine months ended December 30, 2017 and December 31, 2016 both contain 13 weeks. For purposes of presentation, the Company has indicated its accounting year as ending on March 31 and its interim quarterly periods as ending on the applicable calendar month end.

Certain immaterial reclassifications to our previously reported financial information have been made to conform to the current period presentation. In addition, refer to Note 2, Recent Accounting Pronouncements, for details regarding reclassifications made in our condensed consolidated statements of cash flows pursuant to the adoption of new share-based payment accounting guidance in the first quarter of Fiscal Year 2018.

Earnings per common share:

The Company has a share-based compensation plan under which employees, non-employee directors, and consultants may be granted share-based payment awards, including shares of restricted stock on which non-forfeitable dividends are paid on unvested shares. As such, shares of restricted stock are considered participating securities under the two-class method of calculating earnings per share. Historically, the two-class method of calculating earnings per share did not have a material impact on the Company's earnings per share calculation under the treasury stock method. Beginning in the second quarter of Fiscal Year 2018, the Company applied the two-class method of calculating earnings per share because the ratio of participating securities to the weighted average number of common shares outstanding has increased as compared to the historical average, and this dilution will continue if the Company continues to repurchase its common stock at current levels. During periods of net loss, no effect is given to participating securities since they do not share in the losses of the Company; therefore, the treasury stock method was used to calculate earnings per common share for the three and nine months ended December 31, 2017. For further details refer to Note 14, Computation of Earnings Per Common Share.

Immaterial Out-of-Period Correction:

During the first quarter of Fiscal Year 2018, the Company recognized an out-of-period correction to its Fiscal Year 2017 geographic mix of taxable income, which resulted in an overstatement of Fiscal Year 2017 income tax expense by $2.8 million. The Company's correction, recognized in the quarter ended June 30, 2017, resulted in a $2.8 million benefit to income tax expense. The Company assessed the materiality of this error and concluded it was not material to Fiscal Year 2017 and is not expected to be material to the full Fiscal Year 2018.