Shareholder Report |
6 Months Ended | |||||||||
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May 31, 2024
USD ($)
shares
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| Shareholder Report [Line Items] | ||||||||||
| Document Type | N-CSRS | |||||||||
| Amendment Flag | false | |||||||||
| Registrant Name | Fidelity Court Street Trust II | |||||||||
| Entity Central Index Key | 0000880709 | |||||||||
| Entity Investment Company Type | N-1A | |||||||||
| Document Period End Date | May 31, 2024 | |||||||||
| Fidelity New Jersey Municipal Money Market Fund - Institutional Class | ||||||||||
| Shareholder Report [Line Items] | ||||||||||
| Fund Name | Fidelity® New Jersey Municipal Money Market Fund | |||||||||
| Class Name | Fidelity® New Jersey Municipal Money Market Fund Institutional Class | |||||||||
| Trading Symbol | FSKXX | |||||||||
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® New Jersey Municipal Money Market Fund for the period December 1, 2023 to May 31, 2024. | |||||||||
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | |||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. | |||||||||
| Additional Information Phone Number | 1-877-208-0098 | |||||||||
| Additional Information Email | fidfunddocuments@fidelity.com | |||||||||
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec | |||||||||
| Expenses [Text Block] | What were your Fund costs for the last six months?
(based on hypothetical $10,000 investment)
|
|||||||||
| Expenses Paid, Amount | $ 10 | |||||||||
| Expense Ratio, Percent | 0.20% | |||||||||
| Net Assets | $ 1,134,480,995 | |||||||||
| Holdings Count | shares | 185 | |||||||||
| Additional Fund Statistics [Text Block] | Key Fund Statistics
(as of May 31, 2024)
|
|||||||||
| Holdings [Text Block] | EFFECTIVE MATURITY DIVERSIFICATION (% of Fund's net assets) Days 1-7 69.3 8-30 1.8 31-60 6.7 61-90 2.7 91-180 4.8 >180 11.1 Variable Rate Demand Notes (VRDNs) 35.4 Tender Option Bond 24.2 Municipal Securities 24.1 Commercial Paper 1.3 Net Other Assets (Liabilities) 15.0 ASSET ALLOCATION (% of Fund's net assets) | |||||||||
| Fidelity New Jersey Municipal Money Market Fund - Premium Class | ||||||||||
| Shareholder Report [Line Items] | ||||||||||
| Fund Name | Fidelity® New Jersey Municipal Money Market Fund | |||||||||
| Class Name | Fidelity® New Jersey Municipal Money Market Fund Premium Class | |||||||||
| Trading Symbol | FSJXX | |||||||||
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® New Jersey Municipal Money Market Fund for the period December 1, 2023 to May 31, 2024. | |||||||||
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | |||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544 or by sending an e-mail to fidfunddocuments@fidelity.com. | |||||||||
| Additional Information Phone Number | 1-800-544-8544 | |||||||||
| Additional Information Email | fidfunddocuments@fidelity.com | |||||||||
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec | |||||||||
| Expenses [Text Block] | What were your Fund costs for the last six months?
(based on hypothetical $10,000 investment)
|
|||||||||
| Expenses Paid, Amount | $ 15 | |||||||||
| Expense Ratio, Percent | 0.30% | |||||||||
| Net Assets | $ 1,134,480,995 | |||||||||
| Holdings Count | shares | 185 | |||||||||
| Additional Fund Statistics [Text Block] | Key Fund Statistics
(as of May 31, 2024)
|
|||||||||
| Holdings [Text Block] | EFFECTIVE MATURITY DIVERSIFICATION (% of Fund's net assets) Days 1-7 69.3 8-30 1.8 31-60 6.7 61-90 2.7 91-180 4.8 >180 11.1 Variable Rate Demand Notes (VRDNs) 35.4 Tender Option Bond 24.2 Municipal Securities 24.1 Commercial Paper 1.3 Net Other Assets (Liabilities) 15.0 ASSET ALLOCATION (% of Fund's net assets) | |||||||||
| Fidelity New Jersey Municipal Money Market Fund | ||||||||||
| Shareholder Report [Line Items] | ||||||||||
| Fund Name | Fidelity® New Jersey Municipal Money Market Fund | |||||||||
| Class Name | Fidelity® New Jersey Municipal Money Market Fund | |||||||||
| Trading Symbol | FAYXX | |||||||||
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® New Jersey Municipal Money Market Fund for the period December 1, 2023 to May 31, 2024. | |||||||||
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | |||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544 or by sending an e-mail to fidfunddocuments@fidelity.com. | |||||||||
| Additional Information Phone Number | 1-800-544-8544 | |||||||||
| Additional Information Email | fidfunddocuments@fidelity.com | |||||||||
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec | |||||||||
| Expenses [Text Block] | What were your Fund costs for the last six months?
(based on hypothetical $10,000 investment)
|
|||||||||
| Expenses Paid, Amount | $ 21 | |||||||||
| Expense Ratio, Percent | 0.42% | |||||||||
| Net Assets | $ 1,134,480,995 | |||||||||
| Holdings Count | shares | 185 | |||||||||
| Additional Fund Statistics [Text Block] | Key Fund Statistics
(as of May 31, 2024)
|
|||||||||
| Holdings [Text Block] | EFFECTIVE MATURITY DIVERSIFICATION (% of Fund's net assets) Days 1-7 69.3 8-30 1.8 31-60 6.7 61-90 2.7 91-180 4.8 >180 11.1 Variable Rate Demand Notes (VRDNs) 35.4 Tender Option Bond 24.2 Municipal Securities 24.1 Commercial Paper 1.3 Net Other Assets (Liabilities) 15.0 ASSET ALLOCATION (% of Fund's net assets) |