N-2 |
6 Months Ended |
|---|---|
|
Mar. 31, 2025
shares
| |
| Cover [Abstract] | |
| Entity Central Index Key | 0001820378 |
| Amendment Flag | false |
| Document Type | N-CSRS |
| Entity Registrant Name | Thornburg Income Builder Opportunities Trust |
| General Description of Registrant [Abstract] | |
| Investment Objectives and Practices [Text Block] | The Income Builder Opportunities Trust’s investment objective is to seek current income and additional total return. |
| Common Shares [Member] | |
| Capital Stock, Long-Term Debt, and Other Securities [Abstract] | |
| Outstanding Security, Title [Text Block] | Common Shares: |
| Outstanding Security, Held [Shares] | 624,422,359 |