Shareholder Report |
12 Months Ended | ||||||||||||||||||||||||||||||
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Dec. 31, 2025
USD ($)
Holding
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| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||
| Document Type | N-CSR | ||||||||||||||||||||||||||||||
| Amendment Flag | false | ||||||||||||||||||||||||||||||
| Registrant Name | BNY Mellon Investment Funds I | ||||||||||||||||||||||||||||||
| Entity Central Index Key | 0000799295 | ||||||||||||||||||||||||||||||
| Entity Investment Company Type | N-1A | ||||||||||||||||||||||||||||||
| Document Period End Date | Dec. 31, 2025 | ||||||||||||||||||||||||||||||
| C000130461 [Member] | |||||||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||
| Fund Name | BNY Mellon Global Fixed Income Fund | ||||||||||||||||||||||||||||||
| Class Name | Class Y | ||||||||||||||||||||||||||||||
| Trading Symbol | DSDYX | ||||||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BNY Mellon Global Fixed Income Fund (the “Fund”) for the period of January 1, 2025 to December 31, 2025. | ||||||||||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | ||||||||||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at bny.com/investments/literaturecenter. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com. | ||||||||||||||||||||||||||||||
| Additional Information Phone Number | 1-800-373-9387 | ||||||||||||||||||||||||||||||
| Additional Information Email | info@bny.com | ||||||||||||||||||||||||||||||
| Additional Information Website | bny.com/investments/literaturecenter | ||||||||||||||||||||||||||||||
| Expenses [Text Block] |
What were the Fund’s costs for the last year ?
(based on a hypothetical $10,000 investment)
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| Expenses Paid, Amount | $ 50 | ||||||||||||||||||||||||||||||
| Expense Ratio, Percent | 0.49% | ||||||||||||||||||||||||||||||
| Factors Affecting Performance [Text Block] |
How did the Fund perform last year ?
What affected the Fund’s performance?
|
||||||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | ||||||||||||||||||||||||||||||
| Line Graph [Table Text Block] |
How did the Fund perform over the past 10 years?
The Fund’s past performance is not a good predictor of the Fund’s future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Cumulative Performance from January 1 , 2015 through December 31, 2025
Initial Investment of $1,000,000 The above graph compares a hypothetical $1,000,000 investment in the Fund’s Class Y shares to a hypothetical investment of $1,000,000 made in the Bloomberg Global Aggregate Index (Hedged) on 12/31/2015. The performance shown takes into account applicable fees and expenses of the Fund, including management fees and other expenses. The Fund’s performance also assumes the reinvestment of dividends and capital gains. Unlike the Fund, the Index is not subject to charges, fees and other expenses. Investors cannot invest directly in any index.
|
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| Average Annual Return [Table Text Block] |
AVERAGE ANNUAL TOTAL RETURNS (AS OF 12/31/25 )
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| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. | ||||||||||||||||||||||||||||||
| Updated Performance Information Location [Text Block] | For more current information visit bny.com/investments/literaturecenter . | ||||||||||||||||||||||||||||||
| Net Assets | $ 4,494,000,000 | ||||||||||||||||||||||||||||||
| Holdings Count | Holding | 454 | ||||||||||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 14,010,450 | ||||||||||||||||||||||||||||||
| Investment Company Portfolio Turnover | 85.94% | ||||||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] |
KEY FUND STATISTICS (AS OF 12/31/25 )
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| Holdings [Text Block] |
Portfolio Holdings (as of 12/31/25 )
Country Allocation (Based on Net Assets)
Allocation of Holdings (Based on Net Assets)
* Amount represents less than .1%.
|
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| C000031763 [Member] | |||||||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||
| Fund Name | BNY Mellon Global Fixed Income Fund | ||||||||||||||||||||||||||||||
| Class Name | Class I | ||||||||||||||||||||||||||||||
| Trading Symbol | SDGIX | ||||||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BNY Mellon Global Fixed Income Fund (the “Fund”) for the period of January 1, 2025 to December 31, 2025. | ||||||||||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | ||||||||||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at bny.com/investments/literaturecenter. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com. | ||||||||||||||||||||||||||||||
| Additional Information Phone Number | 1-800-373-9387 | ||||||||||||||||||||||||||||||
| Additional Information Email | info@bny.com | ||||||||||||||||||||||||||||||
| Additional Information Website | bny.com/investments/literaturecenter | ||||||||||||||||||||||||||||||
| Expenses [Text Block] |
What were the Fund’s costs for the last year ?
(based on a hypothetical $10,000 investment)
|
||||||||||||||||||||||||||||||
| Expenses Paid, Amount | $ 55 | ||||||||||||||||||||||||||||||
| Expense Ratio, Percent | 0.54% | ||||||||||||||||||||||||||||||
| Factors Affecting Performance [Text Block] |
How did the Fund perform last year ?
What affected the Fund’s performance?
|
||||||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | ||||||||||||||||||||||||||||||
| Line Graph [Table Text Block] |
How did the Fund perform over the past 10 years?
The Fund’s past performance is not a good predictor of the Fund’s future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Cumulative Performance from January 1 , 2015 through December 31, 2025
Initial Investment of $10,000 The above graph compares a hypothetical $10,000 investment in the Fund’s Class I shares to a hypothetical investment of $10,000 made in the Bloomberg Global Aggregate Index (Hedged) on 12/31/2015. The performance shown takes into account applicable fees and expenses of the Fund, including management fees and other expenses. The Fund’s performance also assumes the reinvestment of dividends and capital gains. Unlike the Fund, the Index is not subject to charges, fees and other expenses. Investors cannot invest directly in any index.
|
||||||||||||||||||||||||||||||
| Average Annual Return [Table Text Block] |
AVERAGE ANNUAL TOTAL RETURNS (AS OF 12/31/25 )
|
||||||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. | ||||||||||||||||||||||||||||||
| Updated Performance Information Location [Text Block] | For more current information visit bny.com/investments/literaturecenter . | ||||||||||||||||||||||||||||||
| Net Assets | $ 4,494,000,000 | ||||||||||||||||||||||||||||||
| Holdings Count | Holding | 454 | ||||||||||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 14,010,450 | ||||||||||||||||||||||||||||||
| Investment Company Portfolio Turnover | 85.94% | ||||||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] |
KEY FUND STATISTICS (AS OF 12/31/25 )
|
||||||||||||||||||||||||||||||
| Holdings [Text Block] |
Portfolio Holdings (as of 12/31/25 )
Country Allocation (Based on Net Assets)
Allocation of Holdings (Based on Net Assets)
* Amount represents less than .1%.
|
||||||||||||||||||||||||||||||
| C000081695 [Member] | |||||||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||
| Fund Name | BNY Mellon Global Fixed Income Fund | ||||||||||||||||||||||||||||||
| Class Name | Class C | ||||||||||||||||||||||||||||||
| Trading Symbol | DHGCX | ||||||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BNY Mellon Global Fixed Income Fund (the “Fund”) for the period of January 1, 2025 to December 31, 2025. | ||||||||||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | ||||||||||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at bny.com/investments/literaturecenter. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com. | ||||||||||||||||||||||||||||||
| Additional Information Phone Number | 1-800-373-9387 | ||||||||||||||||||||||||||||||
| Additional Information Email | info@bny.com | ||||||||||||||||||||||||||||||
| Additional Information Website | bny.com/investments/literaturecenter | ||||||||||||||||||||||||||||||
| Expenses [Text Block] |
What were the Fund’s costs for the last year ?
(based on a hypothetical $10,000 investment)
|
||||||||||||||||||||||||||||||
| Expenses Paid, Amount | $ 158 | ||||||||||||||||||||||||||||||
| Expense Ratio, Percent | 1.55% | ||||||||||||||||||||||||||||||
| Factors Affecting Performance [Text Block] |
How did the Fund perform last year ?
What affected the Fund’s performance?
|
||||||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | ||||||||||||||||||||||||||||||
| Line Graph [Table Text Block] |
How did the Fund perform over the past 10 years?
The Fund’s past performance is not a good predictor of the Fund’s future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Cumulative Performance from January 1 , 2015 through December 31, 2025
Initial Investment of $10,000 The above graph compares a hypothetical $10,000 investment in the Fund’s Class C shares to a hypothetical investment of $10,000 made in the Bloomberg Global Aggregate Index (Hedged) on 12/31/2015. The performance shown takes into account the maximum deferred sales charge on Class C shares and applicable fees and expenses of the Fund, including management fees, 12b-1 fees and other expenses. The Fund’s performance also assumes the reinvestment of dividends and capital gains. Unlike the Fund, the Index is not subject to charges, fees and other expenses. Investors cannot invest directly in any index.
|
||||||||||||||||||||||||||||||
| Average Annual Return [Table Text Block] |
AVERAGE ANNUAL TOTAL RETURNS (AS OF 12/31/25 )
|
||||||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. | ||||||||||||||||||||||||||||||
| Updated Performance Information Location [Text Block] | For more current information visit bny.com/investments/literaturecenter . | ||||||||||||||||||||||||||||||
| Net Assets | $ 4,494,000,000 | ||||||||||||||||||||||||||||||
| Holdings Count | Holding | 454 | ||||||||||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 14,010,450 | ||||||||||||||||||||||||||||||
| Investment Company Portfolio Turnover | 85.94% | ||||||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] |
KEY FUND STATISTICS (AS OF 12/31/25 )
|
||||||||||||||||||||||||||||||
| Holdings [Text Block] |
Portfolio Holdings (as of 12/31/25 )
Country Allocation (Based on Net Assets)
Allocation of Holdings (Based on Net Assets)
* Amount represents less than .1%.
|
||||||||||||||||||||||||||||||
| C000081694 [Member] | |||||||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||
| Fund Name | BNY Mellon Global Fixed Income Fund | ||||||||||||||||||||||||||||||
| Class Name | Class A | ||||||||||||||||||||||||||||||
| Trading Symbol | DHGAX | ||||||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BNY Mellon Global Fixed Income Fund (the “Fund”) for the period of January 1, 2025 to December 31, 2025. | ||||||||||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | ||||||||||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at bny.com/investments/literaturecenter. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com. | ||||||||||||||||||||||||||||||
| Additional Information Phone Number | 1-800-373-9387 | ||||||||||||||||||||||||||||||
| Additional Information Email | info@bny.com | ||||||||||||||||||||||||||||||
| Additional Information Website | bny.com/investments/literaturecenter | ||||||||||||||||||||||||||||||
| Expenses [Text Block] |
What were the Fund’s costs for the last year ?
(based on a hypothetical $10,000 investment)
|
||||||||||||||||||||||||||||||
| Expenses Paid, Amount | $ 88 | ||||||||||||||||||||||||||||||
| Expense Ratio, Percent | 0.86% | ||||||||||||||||||||||||||||||
| Factors Affecting Performance [Text Block] |
How did the Fund perform last year ?
What affected the Fund’s performance?
|
||||||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | ||||||||||||||||||||||||||||||
| Line Graph [Table Text Block] |
How did the Fund perform over the past 10 years?
The Fund’s past performance is not a good predictor of the Fund’s future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Cumulative Performance from January 1 , 2015 through December 31, 2025
Initial Investment of $10,000 The above graph compares a hypothetical $10,000 investment in the Fund’s Class A shares to a hypothetical investment of $10,000 made in the Bloomberg Global Aggregate Index (Hedged) on 12/31/2015. The performance shown takes into account the maximum initial sales charge on Class A shares and applicable fees and expenses of the Fund, including management fees and other expenses. The Fund’s performance also assumes the reinvestment of dividends and capital gains. Unlike the Fund, the Index is not subject to charges, fees and other expenses. Investors cannot invest directly in any index.
|
||||||||||||||||||||||||||||||
| Average Annual Return [Table Text Block] |
AVERAGE ANNUAL TOTAL RETURNS (AS OF 12/31/25 )
|
||||||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. | ||||||||||||||||||||||||||||||
| Updated Performance Information Location [Text Block] | For more current information visit bny.com/investments/literaturecenter . | ||||||||||||||||||||||||||||||
| Net Assets | $ 4,494,000,000 | ||||||||||||||||||||||||||||||
| Holdings Count | Holding | 454 | ||||||||||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 14,010,450 | ||||||||||||||||||||||||||||||
| Investment Company Portfolio Turnover | 85.94% | ||||||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] |
KEY FUND STATISTICS (AS OF 12/31/25 )
|
||||||||||||||||||||||||||||||
| Holdings [Text Block] |
Portfolio Holdings (as of 12/31/25 )
Country Allocation (Based on Net Assets)
Allocation of Holdings (Based on Net Assets)
* Amount represents less than .1%.
|