Shareholder Report |
6 Months Ended | |||||
|---|---|---|---|---|---|---|
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Apr. 30, 2026
USD ($)
Holding
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| Shareholder Report [Line Items] | ||||||
| Document Type | N-CSRS | |||||
| Amendment Flag | false | |||||
| Registrant Name | BlackRock Funds | |||||
| Entity Central Index Key | 0000844779 | |||||
| Entity Investment Company Type | N-1A | |||||
| Document Period End Date | Apr. 30, 2026 | |||||
| C000206968 | ||||||
| Shareholder Report [Line Items] | ||||||
| Fund Name | BlackRock China A Opportunities Fund | |||||
| Class Name | Institutional Shares | |||||
| Trading Symbol | CHILX | |||||
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about BlackRock China A Opportunities Fund (the “Fund”) for the period of November 1, 2025 to April 30, 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) 537-4942. | |||||
| Additional Information Website | blackrock.com/fundreports | |||||
| Expenses [Text Block] | ||||||
| Expenses Paid, Amount | $ 52 | |||||
| Expense Ratio, Percent | 0.99% | [1] | ||||
| AssetsNet | $ 24,111,853 | |||||
| Holdings Count | Holding | 215 | |||||
| InvestmentCompanyPortfolioTurnover | 109.00% | |||||
| Additional Fund Statistics [Text Block] | Key Fund statistics |
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| C000206969 | ||||||
| Shareholder Report [Line Items] | ||||||
| Fund Name | BlackRock China A Opportunities Fund | |||||
| Class Name | Class K Shares | |||||
| Trading Symbol | CHKLX | |||||
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about BlackRock China A Opportunities Fund (the “Fund”) for the period of November 1, 2025 to April 30, 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) 537-4942. | |||||
| Additional Information Website | blackrock.com/fundreports | |||||
| Expenses [Text Block] | ||||||
| Expenses Paid, Amount | $ 50 | |||||
| Expense Ratio, Percent | 0.94% | [2] | ||||
| AssetsNet | $ 24,111,853 | |||||
| Holdings Count | Holding | 215 | |||||
| InvestmentCompanyPortfolioTurnover | 109.00% | |||||
| Additional Fund Statistics [Text Block] | Key Fund statistics |
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