Shareholder Report
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12 Months Ended |
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Apr. 30, 2026
USD ($)
Holding
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|---|
| Shareholder Report [Line Items] |
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| Document Type |
N-CSR
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| Amendment Flag |
false
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| Registrant Name |
BlackRock Global Allocation Fund, Inc.
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| Entity Central Index Key |
0000834237
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| Entity Investment Company Type |
N-1A
|
| Document Period End Date |
Apr. 30, 2026
|
| C000172904 |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
BlackRock Global Allocation Fund, Inc.
|
| Class Name |
Class K Shares
|
| Trading Symbol |
MKLOX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about BlackRock Global Allocation Fund, Inc. (the “Fund”) for the period of May 1, 2025 to April 30, 2026.
|
| Shareholder Report Annual or Semi-Annual |
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.
|
| Additional Information Website |
blackrock.com/fundreports
|
| Expenses [Text Block] |
What were the Fund costs for the last year?(based on a hypothetical $10,000 investment) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class K Shares | $83 | 0.75% |
|---|
|
| Expenses Paid, Amount |
$ 83
|
| Expense Ratio, Percent |
0.75%
|
| Factors Affecting Performance [Text Block] |
How did the Fund perform last year?For the reporting period ended April 30, 2026, the Fund's Class K shares returned 21.76%. For the same period, the Fund’s benchmark, the FTSE World Index returned 33.25% and the Reference Benchmark (a custom blended benchmark, consisting of 36% S&P 500 Index; 24% FTSE World (ex U.S.) Index; 24% ICE BofA Current 5-Year U.S. Treasury Index; and 16% FTSE Non-U.S. Dollar World Government Bond Index), returned 20.50%.
What contributed to performance?In equities, holdings within the information technology, industrials, communication services and financials sectors contributed to absolute performance. Positions in investment grade and high yield corporate bonds positively impacted return in fixed income, along with holdings of securitized assets. Holdings in gold-related securities were additive as well. The Fund’s weighting in cash and cash equivalents was approximately 5% of net assets at the close of the period. The cash position helped manage portfolio volatility and served as a source of funds for new investments and redemptions. Holdings in cash and cash equivalents contributed to performance. The Fund uses derivatives, which may include options, futures, swaps and forward contracts, in an effort to enhance returns and manage the risk of adverse market movements. The Fund’s use of derivatives in aggregate added to performance in the annual period. What detracted from performance?In equities, holdings within the healthcare sector detracted, as did the use of interest rate derivatives within fixed income. |
| Performance Past Does Not Indicate Future [Text] |
Past performance is not an indication of future results.
|
| Average Annual Return [Table Text Block] |
Table SummaryAverage Annual Total Returns | 1 Year | 5 Years | 10 Years |
|---|
Class K Shares ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21.76% | 5.60% | 7.95% |
|---|
FTSE World Index........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 33.25 | 12.04 | 13.27 |
|---|
Reference Benchmark........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 20.50 | 6.77 | 8.23 |
|---|
|
| No Deduction of Taxes [Text Block] |
Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
|
| Performance Table Market Index Changed [Text Block] |
|
| Material Change Description [Text Block] |
|
| Updated Performance Information Location [Text Block] |
Visit blackrock.com for more recent performance information.
|
| AssetsNet |
$ 17,228,498,631
|
| Holdings Count | Holding |
3,339
|
| Advisory Fees Paid, Amount |
$ 120,853,582
|
| InvestmentCompanyPortfolioTurnover |
130.00%
|
| Additional Fund Statistics [Text Block] |
Key Fund statistics
|
| C000005794 |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
BlackRock Global Allocation Fund, Inc.
|
| Class Name |
Class R Shares
|
| Trading Symbol |
MRLOX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about BlackRock Global Allocation Fund, Inc. (the “Fund”) for the period of May 1, 2025 to April 30, 2026.
|
| Shareholder Report Annual or Semi-Annual |
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.
|
| Additional Information Website |
blackrock.com/fundreports
|
| Expenses [Text Block] |
What were the Fund costs for the last year?(based on a hypothetical $10,000 investment) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class R Shares | $162 | 1.46% |
|---|
|
| Expenses Paid, Amount |
$ 162
|
| Expense Ratio, Percent |
1.46%
|
| Factors Affecting Performance [Text Block] |
How did the Fund perform last year?For the reporting period ended April 30, 2026, the Fund's Class R shares returned 20.91%. For the same period, the Fund’s benchmark, the FTSE World Index returned 33.25% and the Reference Benchmark (a custom blended benchmark, consisting of 36% S&P 500 Index; 24% FTSE World (ex U.S.) Index; 24% ICE BofA Current 5-Year U.S. Treasury Index; and 16% FTSE Non-U.S. Dollar World Government Bond Index), returned 20.50%.
What contributed to performance?In equities, holdings within the information technology, industrials, communication services and financials sectors contributed to absolute performance. Positions in investment grade and high yield corporate bonds positively impacted return in fixed income, along with holdings of securitized assets. Holdings in gold-related securities were additive as well. The Fund’s weighting in cash and cash equivalents was approximately 5% of net assets at the close of the period. The cash position helped manage portfolio volatility and served as a source of funds for new investments and redemptions. Holdings in cash and cash equivalents contributed to performance. The Fund uses derivatives, which may include options, futures, swaps and forward contracts, in an effort to enhance returns and manage the risk of adverse market movements. The Fund’s use of derivatives in aggregate added to performance in the annual period. What detracted from performance?In equities, holdings within the healthcare sector detracted, as did the use of interest rate derivatives within fixed income. |
| Performance Past Does Not Indicate Future [Text] |
Past performance is not an indication of future results.
|
| Average Annual Return [Table Text Block] |
Table SummaryAverage Annual Total Returns | 1 Year | 5 Years | 10 Years |
|---|
Class R Shares ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 20.91% | 4.86% | 7.21% |
|---|
FTSE World Index........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 33.25 | 12.04 | 13.27 |
|---|
Reference Benchmark........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 20.50 | 6.77 | 8.23 |
|---|
|
| No Deduction of Taxes [Text Block] |
Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
|
| Performance Table Market Index Changed [Text Block] |
|
| Material Change Description [Text Block] |
|
| Updated Performance Information Location [Text Block] |
Visit blackrock.com for more recent performance information.
|
| AssetsNet |
$ 17,228,498,631
|
| Holdings Count | Holding |
3,339
|
| Advisory Fees Paid, Amount |
$ 120,853,582
|
| InvestmentCompanyPortfolioTurnover |
130.00%
|
| Additional Fund Statistics [Text Block] |
Key Fund statistics
|
| C000005793 |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
BlackRock Global Allocation Fund, Inc.
|
| Class Name |
Institutional Shares
|
| Trading Symbol |
MALOX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about BlackRock Global Allocation Fund, Inc. (the “Fund”) for the period of May 1, 2025 to April 30, 2026.
|
| Shareholder Report Annual or Semi-Annual |
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.
|
| Additional Information Website |
blackrock.com/fundreports
|
| Expenses [Text Block] |
What were the Fund costs for the last year?(based on a hypothetical $10,000 investment) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Institutional Shares | $94 | 0.84% |
|---|
|
| Expenses Paid, Amount |
$ 94
|
| Expense Ratio, Percent |
0.84%
|
| Factors Affecting Performance [Text Block] |
How did the Fund perform last year?For the reporting period ended April 30, 2026, the Fund's Institutional shares returned 21.62%. For the same period, the Fund’s benchmark, the FTSE World Index returned 33.25% and the Reference Benchmark (a custom blended benchmark, consisting of 36% S&P 500 Index; 24% FTSE World (ex U.S.) Index; 24% ICE BofA Current 5-Year U.S. Treasury Index; and 16% FTSE Non-U.S. Dollar World Government Bond Index), returned 20.50%.
What contributed to performance?In equities, holdings within the information technology, industrials, communication services and financials sectors contributed to absolute performance. Positions in investment grade and high yield corporate bonds positively impacted return in fixed income, along with holdings of securitized assets. Holdings in gold-related securities were additive as well. The Fund’s weighting in cash and cash equivalents was approximately 5% of net assets at the close of the period. The cash position helped manage portfolio volatility and served as a source of funds for new investments and redemptions. Holdings in cash and cash equivalents contributed to performance. The Fund uses derivatives, which may include options, futures, swaps and forward contracts, in an effort to enhance returns and manage the risk of adverse market movements. The Fund’s use of derivatives in aggregate added to performance in the annual period. What detracted from performance?In equities, holdings within the healthcare sector detracted, as did the use of interest rate derivatives within fixed income. |
| Performance Past Does Not Indicate Future [Text] |
Past performance is not an indication of future results.
|
| Average Annual Return [Table Text Block] |
Table SummaryAverage Annual Total Returns | 1 Year | 5 Years | 10 Years |
|---|
Institutional Shares ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21.62% | 5.50% | 7.86% |
|---|
FTSE World Index........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 33.25 | 12.04 | 13.27 |
|---|
Reference Benchmark........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 20.50 | 6.77 | 8.23 |
|---|
|
| No Deduction of Taxes [Text Block] |
Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
|
| Performance Table Market Index Changed [Text Block] |
|
| Material Change Description [Text Block] |
|
| Updated Performance Information Location [Text Block] |
Visit blackrock.com for more recent performance information.
|
| AssetsNet |
$ 17,228,498,631
|
| Holdings Count | Holding |
3,339
|
| Advisory Fees Paid, Amount |
$ 120,853,582
|
| InvestmentCompanyPortfolioTurnover |
130.00%
|
| Additional Fund Statistics [Text Block] |
Key Fund statistics
|
| C000005790 |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
BlackRock Global Allocation Fund, Inc.
|
| Class Name |
Investor A Shares
|
| Trading Symbol |
MDLOX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about BlackRock Global Allocation Fund, Inc. (the “Fund”) for the period of May 1, 2025 to April 30, 2026.
|
| Shareholder Report Annual or Semi-Annual |
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.
|
| Additional Information Website |
blackrock.com/fundreports
|
| Expenses [Text Block] |
What were the Fund costs for the last year?(based on a hypothetical $10,000 investment) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Investor A Shares | $119 | 1.08% |
|---|
|
| Expenses Paid, Amount |
$ 119
|
| Expense Ratio, Percent |
1.08%
|
| Factors Affecting Performance [Text Block] |
How did the Fund perform last year?For the reporting period ended April 30, 2026, the Fund's Investor A Shares returned 21.35%. For the same period, the Fund’s benchmark, the FTSE World Index returned 33.25% and the Reference Benchmark (a custom blended benchmark, consisting of 36% S&P 500 Index; 24% FTSE World (ex U.S.) Index; 24% ICE BofA Current 5-Year U.S. Treasury Index; and 16% FTSE Non-U.S. Dollar World Government Bond Index), returned 20.50%.
What contributed to performance?In equities, holdings within the information technology, industrials, communication services and financials sectors contributed to absolute performance. Positions in investment grade and high yield corporate bonds positively impacted return in fixed income, along with holdings of securitized assets. Holdings in gold-related securities were additive as well. The Fund’s weighting in cash and cash equivalents was approximately 5% of net assets at the close of the period. The cash position helped manage portfolio volatility and served as a source of funds for new investments and redemptions. Holdings in cash and cash equivalents contributed to performance. The Fund uses derivatives, which may include options, futures, swaps and forward contracts, in an effort to enhance returns and manage the risk of adverse market movements. The Fund’s use of derivatives in aggregate added to performance in the annual period. What detracted from performance?In equities, holdings within the healthcare sector detracted, as did the use of interest rate derivatives within fixed income. |
| Performance Past Does Not Indicate Future [Text] |
Past performance is not an indication of future results.
|
| Average Annual Return [Table Text Block] |
Table SummaryAverage Annual Total Returns | 1 Year | 5 Years | 10 Years |
|---|
Investor A Shares ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21.35% | 5.24% | 7.59% |
|---|
Investor A Shares (with sales charge)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.98 | 4.11 | 7.01 |
|---|
FTSE World Index........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 33.25 | 12.04 | 13.27 |
|---|
Reference Benchmark........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 20.50 | 6.77 | 8.23 |
|---|
|
| No Deduction of Taxes [Text Block] |
Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
|
| Performance Table Market Index Changed [Text Block] |
|
| Material Change Description [Text Block] |
|
| Updated Performance Information Location [Text Block] |
Visit blackrock.com for more recent performance information.
|
| AssetsNet |
$ 17,228,498,631
|
| Holdings Count | Holding |
3,339
|
| Advisory Fees Paid, Amount |
$ 120,853,582
|
| InvestmentCompanyPortfolioTurnover |
130.00%
|
| Additional Fund Statistics [Text Block] |
Key Fund statistics
|
| C000005792 |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
BlackRock Global Allocation Fund, Inc.
|
| Class Name |
Investor C Shares
|
| Trading Symbol |
MCLOX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about BlackRock Global Allocation Fund, Inc. (the “Fund”) for the period of May 1, 2025 to April 30, 2026.
|
| Shareholder Report Annual or Semi-Annual |
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.
|
| Additional Information Website |
blackrock.com/fundreports
|
| Expenses [Text Block] |
What were the Fund costs for the last year?(based on a hypothetical $10,000 investment) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Investor C Shares | $208 | 1.89% |
|---|
|
| Expenses Paid, Amount |
$ 208
|
| Expense Ratio, Percent |
1.89%
|
| Factors Affecting Performance [Text Block] |
How did the Fund perform last year?For the reporting period ended April 30, 2026, the Fund's Investor C Shares returned 20.37%. For the same period, the Fund’s benchmark, the FTSE World Index returned 33.25% and the Reference Benchmark (a custom blended benchmark, consisting of 36% S&P 500 Index; 24% FTSE World (ex U.S.) Index; 24% ICE BofA Current 5-Year U.S. Treasury Index; and 16% FTSE Non-U.S. Dollar World Government Bond Index), returned 20.50%.
What contributed to performance?In equities, holdings within the information technology, industrials, communication services and financials sectors contributed to absolute performance. Positions in investment grade and high yield corporate bonds positively impacted return in fixed income, along with holdings of securitized assets. Holdings in gold-related securities were additive as well. The Fund’s weighting in cash and cash equivalents was approximately 5% of net assets at the close of the period. The cash position helped manage portfolio volatility and served as a source of funds for new investments and redemptions. Holdings in cash and cash equivalents contributed to performance. The Fund uses derivatives, which may include options, futures, swaps and forward contracts, in an effort to enhance returns and manage the risk of adverse market movements. The Fund’s use of derivatives in aggregate added to performance in the annual period. What detracted from performance?In equities, holdings within the healthcare sector detracted, as did the use of interest rate derivatives within fixed income. |
| Performance Past Does Not Indicate Future [Text] |
Past performance is not an indication of future results.
|
| Average Annual Return [Table Text Block] |
Table SummaryAverage Annual Total Returns | 1 Year | 5 Years | 10 Years |
|---|
Investor C Shares ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 20.37% | 4.41% | 6.93% |
|---|
Investor C Shares (with sales charge)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.37 | 4.41 | 6.93 |
|---|
FTSE World Index........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 33.25 | 12.04 | 13.27 |
|---|
Reference Benchmark........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 20.50 | 6.77 | 8.23 |
|---|
|
| No Deduction of Taxes [Text Block] |
Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
|
| Performance Table Market Index Changed [Text Block] |
|
| Material Change Description [Text Block] |
|
| Updated Performance Information Location [Text Block] |
Visit blackrock.com for more recent performance information.
|
| AssetsNet |
$ 17,228,498,631
|
| Holdings Count | Holding |
3,339
|
| Advisory Fees Paid, Amount |
$ 120,853,582
|
| InvestmentCompanyPortfolioTurnover |
130.00%
|
| Additional Fund Statistics [Text Block] |
Key Fund statistics
|