Shareholder Report |
6 Months Ended | ||||||||||||||||||||||||||
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Jun. 30, 2026
USD ($)
Holding
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| Shareholder Report [Line Items] | |||||||||||||||||||||||||||
| Document Type | N-CSRS | ||||||||||||||||||||||||||
| Amendment Flag | false | ||||||||||||||||||||||||||
| Registrant Name | Schwab Capital Trust | ||||||||||||||||||||||||||
| Entity Central Index Key | 0000904333 | ||||||||||||||||||||||||||
| Entity Investment Company Type | N-1A | ||||||||||||||||||||||||||
| Document Period End Date | Jun. 30, 2026 | ||||||||||||||||||||||||||
| Schwab Monthly Income Fund – Target Payout | |||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||
| Fund Name | Schwab Monthly Income Fund – Target Payout | ||||||||||||||||||||||||||
| Class Name | Schwab Monthly Income Fund – Target Payout | ||||||||||||||||||||||||||
| Trading Symbol | SWJRX | ||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This contains important information about the fund for the period of January 1, 2026, to June 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 www.schwabassetmanagement.com/prospectus. You can also request this information by calling 1-866-414-6349 or by sending an email request to orders@mysummaryprospectus.com. | ||||||||||||||||||||||||||
| Additional Information Phone Number | 1-866-414-6349 | ||||||||||||||||||||||||||
| Additional Information Email | orders@mysummaryprospectus.com | ||||||||||||||||||||||||||
| Additional Information Website | www.schwabassetmanagement.com/prospectus | ||||||||||||||||||||||||||
| Expenses [Text Block] | FUND COSTS FOR THE LAST six months ENDED June 30, 2026 (BASED ON A HYPOTHETICAL $10,000 INVESTMENT)
* Expenses were reduced by a contractual fee waiver in effect for so long as the investment adviser serves as adviser to the fund. This agreement to limit the total annual fund operating expenses is limited to the fund’s direct operating expenses and, therefore, does not apply to acquired fund fees and expenses (AFFE), which are indirect expenses incurred by the fund through its investments in the underlying funds. ** Annualized. |
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| Expenses Paid, Amount | $ 0 | [1] | |||||||||||||||||||||||||
| Expense Ratio, Percent | 0.00% | [1],[2] | |||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The performance data quoted represents past performance. Past performance does not guarantee future results. | ||||||||||||||||||||||||||
| Average Annual Return [Table Text Block] | Average Annual Total Returns
All total returns on this page assume dividends and distributions were reinvested. Index figures do not include trading and management costs, which would lower performance. Indices are unmanaged and cannot be invested in directly. Performance results less than one year are not annualized. For index definitions, please see www.schwabassetmanagement.com/glossary. 1 The fund’s routine expenses have been absorbed by the investment adviser and its affiliates. Without these reductions, the fund’s returns would have been lower. These returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. |
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| Performance Inception Date | Mar. 28, 2008 | ||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | These returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.
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| Updated Performance Information Location [Text Block] | To obtain performance information current to the most recent month end, please visit www.schwabassetmanagement.com/prospectus. | ||||||||||||||||||||||||||
| Net Assets | $ 68,000,000 | ||||||||||||||||||||||||||
| Holdings Count | Holding | 11 | ||||||||||||||||||||||||||
| Investment Company, Portfolio Turnover | 12.00% | ||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] | Statistics
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| Holdings [Text Block] | Asset Class Weightings % of Investments ![]() Top Holdings % of Net Assets ![]() Portfolio holdings may have changed since the report date. |
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| Largest Holdings [Text Block] | Top Holdings % of Net Assets ![]() Portfolio holdings may have changed since the report date. |
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| Schwab Monthly Income Fund – Flexible Payout | |||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||
| Fund Name | Schwab Monthly Income Fund – Flexible Payout | ||||||||||||||||||||||||||
| Class Name | Schwab Monthly Income Fund – Flexible Payout | ||||||||||||||||||||||||||
| Trading Symbol | SWKRX | ||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This contains important information about the fund for the period of January 1, 2026, to June 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 www.schwabassetmanagement.com/prospectus. You can also request this information by calling 1-866-414-6349 or by sending an email request to orders@mysummaryprospectus.com. | ||||||||||||||||||||||||||
| Additional Information Phone Number | 1-866-414-6349 | ||||||||||||||||||||||||||
| Additional Information Email | orders@mysummaryprospectus.com | ||||||||||||||||||||||||||
| Additional Information Website | www.schwabassetmanagement.com/prospectus | ||||||||||||||||||||||||||
| Expenses [Text Block] | FUND COSTS FOR THE LAST six months ENDED June 30, 2026 (BASED ON A HYPOT HETI CAL $10,000 INVESTMENT)
* Expenses were reduced by a contractual fee waiver in effect for so long as the investment adviser serves as adviser to the fund. This agreement to limit the total annual fund operating expenses is limited to the fund’s direct operating expenses and, therefore, does not apply to acquired fund fees and expenses (AFFE), which are indirect expenses incurred by the fund through its investments in the underlying funds. ** Annualized. |
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| Expenses Paid, Amount | $ 0 | [1] | |||||||||||||||||||||||||
| Expense Ratio, Percent | 0.00% | [1],[2] | |||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The performance data quoted represents past performance. Past performance does not guarantee future results. | ||||||||||||||||||||||||||
| Average Annual Return [Table Text Block] | Average Annual Total Returns
All total returns on this page assume dividends and distributions were reinvested. Index figures do not include trading and management costs, which would lower performance. Indices are unmanaged and cannot be invested in directly. Performance results less than one year are not annualized. For index definitions, please see www.schwabassetmanagement.com/glossary. 1 The fund’s routine expenses have been absorbed by the investment adviser and its affiliates. Without these reductions, the fund’s returns would have been lower. These returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. |
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| Performance Inception Date | Mar. 28, 2008 | ||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | These returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.
|
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| Updated Performance Information Location [Text Block] | To obtain performance information current to the most recent month end, please visit www.schwabassetmanagement.com/prospectus. | ||||||||||||||||||||||||||
| Net Assets | $ 82,000,000 | ||||||||||||||||||||||||||
| Holdings Count | Holding | 11 | ||||||||||||||||||||||||||
| Investment Company, Portfolio Turnover | 7.00% | ||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] | Statistics
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| Holdings [Text Block] | Asset Class Weightings % of Investments ![]() Top Holdings % of Net Assets ![]() Portfolio holdings may have changed since th e re port date. |
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| Largest Holdings [Text Block] | Top Holdings % of Net Assets ![]() Portfolio holdings may have changed since th e re port date. |
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| Schwab Monthly Income Fund – Income Payout | |||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||
| Fund Name | Schwab Monthly Income Fund – Income Payout | ||||||||||||||||||||||||||
| Class Name | Schwab Monthly Income Fund – Income Payout | ||||||||||||||||||||||||||
| Trading Symbol | SWLRX | ||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This contains important information about the fund for the period of January 1, 2026, to June 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 www.schwabassetmanagement.com/prospectus. You can also request this information by calling 1-866-414-6349 or by sending an email request to orders@mysummaryprospectus.com. | ||||||||||||||||||||||||||
| Additional Information Phone Number | 1-866-414-6349 | ||||||||||||||||||||||||||
| Additional Information Email | orders@mysummaryprospectus.com | ||||||||||||||||||||||||||
| Additional Information Website | www.schwabassetmanagement.com/prospectus | ||||||||||||||||||||||||||
| Expenses [Text Block] | FUND COSTS FOR THE LAST six months ENDED J une 30, 2026 (BASED ON A HYPOTHETICAL $10,000 INVESTMENT)
* Expenses were reduced by a contractual fee waiver in effect for so long as the investment adviser serves as adviser to the fund. This agreement to limit the total annual fund operating expenses is limited to the fund’s direct operating expenses and, therefore, does not apply to acquired fund fees and expenses (AFFE), which are indirect expenses incurred by the fund through its investments in the underlying funds. ** Annualized. |
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| Expenses Paid, Amount | $ 0 | [1] | |||||||||||||||||||||||||
| Expense Ratio, Percent | 0.00% | [1],[2] | |||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The performance data quoted represents past performance. Past performance does not guarantee future results. | ||||||||||||||||||||||||||
| Average Annual Return [Table Text Block] | Average Annual Total Returns
All total returns on this page assume dividends and distributions were reinvested. Index figures do not include trading and management costs, which would lower performance. Indices are unmanaged and cannot be invested in directly. Performance results less than one year are not annualized. For index definitions, please see www.schwabassetmanagement.com/glossary. 1 The fund’s routine expenses have been absorbed by the investment adviser and its affiliates. Without these reductions, the fund’s returns would have been lower. These returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. |
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| Performance Inception Date | Mar. 28, 2008 | ||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | These returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.
|
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| Updated Performance Information Location [Text Block] | To obtain performance information current to the most recent month end, please visit www.schwabassetmanagement.com/prospectus. | ||||||||||||||||||||||||||
| Net Assets | $ 73,000,000 | ||||||||||||||||||||||||||
| Holdings Count | Holding | 12 | ||||||||||||||||||||||||||
| Investment Company, Portfolio Turnover | 14.00% | ||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] | Statistics
|
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| Holdings [Text Block] | Asset Class Weightings % of Investments ![]() Top Holdings % of Net Assets ![]() Portfolio holdings may have changed since the rep ort date. |
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| Largest Holdings [Text Block] | Top Holdings % of Net Assets ![]() Portfolio holdings may have changed since the rep ort date. |
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