N-2
N-2 | 6 Months Ended |
Jun. 30, 2023 shares | |
Cover [Abstract] | |
Entity Central Index Key | 0001308927 |
Amendment Flag | false |
Document Type | N-CSRS |
Entity Registrant Name | Eaton Vance Tax‑Managed Buy‑Write Income Fund |
General Description of Registrant [Abstract] | |
Investment Objectives and Practices [Text Block] | The Fund's primary investment objective is to provide current income and gains, with a secondary objective of capital appreciation. |
Common Shares [Member] | |
Capital Stock, Long-Term Debt, and Other Securities [Abstract] | |
Outstanding Security, Title [Text Block] | Common Shares |
Outstanding Security, Held [Shares] | 29,374,715 |