Shareholder Report |
6 Months Ended | |||||||||||
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Mar. 31, 2026
USD ($)
Holding
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| Shareholder Report [Line Items] | ||||||||||||
| Document Type | N-CSRS | |||||||||||
| Amendment Flag | false | |||||||||||
| Registrant Name | BlackRock Allocation Target Shares | |||||||||||
| Entity Central Index Key | 0001221845 | |||||||||||
| Entity Investment Company Type | N-1A | |||||||||||
| Document Period End Date | Mar. 31, 2026 | |||||||||||
| C000248219 | ||||||||||||
| Shareholder Report [Line Items] | ||||||||||||
| Fund Name | BATS: High Income Taxable Series | |||||||||||
| Trading Symbol | BATIX | |||||||||||
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about BATS: High Income Taxable Series (the “Fund”) for the period of October 1, 2025 to March 31, 2026. | |||||||||||
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report | |||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441-7762. | |||||||||||
| Material Fund Change Notice [Text Block] | ||||||||||||
| Additional Information Website | blackrock.com/fundreports | |||||||||||
| Expenses [Text Block] | What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment)
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| Expenses Paid, Amount | $ 0 | |||||||||||
| Expense Ratio, Percent | 0.00% | [1] | ||||||||||
| AssetsNet | $ 94,587,909 | |||||||||||
| Holdings Count | Holding | 1,145 | |||||||||||
| InvestmentCompanyPortfolioTurnover | 192.00% | |||||||||||
| Additional Fund Statistics [Text Block] | Key Fund statistics
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- Details
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