Shareholder Report |
12 Months Ended | |||||||||||||
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May 31, 2026
USD ($)
Holding
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| Shareholder Report [Line Items] | ||||||||||||||
| Document Type | N-CSR | |||||||||||||
| Amendment Flag | false | |||||||||||||
| Registrant Name | Capital Group Central Fund Series II | |||||||||||||
| Entity Central Index Key | 0001841440 | |||||||||||||
| Entity Investment Company Type | N-1A | |||||||||||||
| Document Period End Date | May 31, 2026 | |||||||||||||
| Capital Group Central Corporate Bond Fund (Class M) | ||||||||||||||
| Shareholder Report [Line Items] | ||||||||||||||
| Fund Name | Capital Group Central Corporate Bond Fund | |||||||||||||
| Class Name | Class M | |||||||||||||
| Trading Symbol | CCBFX | |||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Capital Group Central Corporate Bond Fund (the "fund") for the period from June 1, 2025 to May 31, 2026. | |||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |||||||||||||
| Additional Information [Text Block] | You can find additional information about the fund at capitalgroup.com/CCBF-M. You can also request this information by contacting us at (800) 421-4225. | |||||||||||||
| Additional Information Phone Number | (800) 421-4225 | |||||||||||||
| Additional Information Website | capitalgroup.com/CCBF-M | |||||||||||||
| Expenses [Text Block] | What were the fund (based on a hypothetical $10,000 investment)costs for the last year?
* Amount less than $1.† Amount less than 0.01%. |
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| Expenses Paid, Amount | $ 0 | [1] | ||||||||||||
| Expense Ratio, Percent | 0.00% | [2] | ||||||||||||
| Factors Affecting Performance [Text Block] | Management's discussion of fund performance The fund’s Class M shares gained 5.81% for the year ended May 31, 2026. That result compares with a 5.13% gain for the Bloomberg U.S. Aggregate Index. What factors influenced results During the fund’s fiscal year, U.S. corporate bonds posted strong returns. The U.S. economy remained resilient, although a softening labor market prompted the U.S. Federal Reserve to implement three 25-basis-point rate cuts over the period. Treasury yields varied, ending the period at their highest level since January. Meanwhile, credit spreads tightened modestly, underpinned by strong investor demand and resilient corporate fundamentals. Within the fund, holdings in electric utilities and Treasuries sectors were particularly additive to results, relative to the benchmark. Similarly, holdings in consumer noncyclicals, insurance and cash & money markets added to relative returns. Conversely, investments in energy and banking-related bonds weighed on results relative to the benchmark. To a l
e sser degree, holdings within technology and consumer cyclical sectors detracted. Additionally, exposure to derivatives, duration and curve positioning detracted from the overall results. |
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| Performance Past Does Not Indicate Future [Text] | The fund’s past performance is not a predictor of its future performance. | |||||||||||||
| Line Graph [Table Text Block] |
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| Average Annual Return [Table Text Block] | Average annual total returns
1 Class M shares were first offered on April 23, 2021.2 Investment results assume all distributions are reinvested and reflect applicable fees and expenses. When applicable, results reflect fee waivers and/or expense reimbursements, without which they would have been lower.3 Results assume all distributions are reinvested. Any market index shown is unmanaged, and therefore, has no expenses. Investors cannot invest directly in an index. Source(s): Bloomberg Index Services Ltd. |
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| Performance Inception Date | Apr. 23, 2021 | |||||||||||||
| No Deduction of Taxes [Text Block] | The line chart and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. | |||||||||||||
| Net Assets | $ 11,930,000,000 | |||||||||||||
| Holdings Count | Holding | 852 | |||||||||||||
| Advisory Fees Paid, Amount | $ 0 | |||||||||||||
| Investment Company, Portfolio Turnover | 213.00% | |||||||||||||
| Additional Fund Statistics [Text Block] | Key fund statistics
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| Holdings [Text Block] | Portfolio holdings by sector (percent of net assets) *Includes derivatives. |
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