John Hancock Municipal Opportunities Fund Annual Fund Operating Expenses - Classes A C I and R6 [Member] - John Hancock Municipal Opportunities Fund |
May 31, 2026 |
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| Prospectus [Line Items] | ||||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | <span style="font-family:Arial Narrow;font-size:8pt;">September 30, 2027</span><span style="font-family:Arial Narrow;font-size:8pt;">September 30, 2027</span> | |||||||||
| Class A | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Management Fees (as a percentage of Assets) | 0.46% | |||||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||||
| Other Expenses (as a percentage of Assets): | 0.15% | |||||||||
| Acquired Fund Fees and Expenses | 0.01% | [1] | ||||||||
| Expenses (as a percentage of Assets) | 0.87% | [2] | ||||||||
| Fee Waiver or Reimbursement | (0.13%) | [3],[4] | ||||||||
| Net Expenses (as a percentage of Assets) | 0.74% | |||||||||
| Class C | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Management Fees (as a percentage of Assets) | 0.46% | |||||||||
| Distribution and Service (12b-1) Fees | 1.00% | |||||||||
| Other Expenses (as a percentage of Assets): | 0.15% | |||||||||
| Acquired Fund Fees and Expenses | 0.01% | [1] | ||||||||
| Expenses (as a percentage of Assets) | 1.62% | [2] | ||||||||
| Fee Waiver or Reimbursement | (0.13%) | [3],[4] | ||||||||
| Net Expenses (as a percentage of Assets) | 1.49% | |||||||||
| Class I | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Management Fees (as a percentage of Assets) | 0.46% | |||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||
| Other Expenses (as a percentage of Assets): | 0.15% | |||||||||
| Acquired Fund Fees and Expenses | 0.01% | [1] | ||||||||
| Expenses (as a percentage of Assets) | 0.62% | [2] | ||||||||
| Fee Waiver or Reimbursement | (0.03%) | [3] | ||||||||
| Net Expenses (as a percentage of Assets) | 0.59% | |||||||||
| Class R6 | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Management Fees (as a percentage of Assets) | 0.46% | |||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||
| Other Expenses (as a percentage of Assets): | 0.07% | |||||||||
| Acquired Fund Fees and Expenses | 0.01% | [1] | ||||||||
| Expenses (as a percentage of Assets) | 0.54% | [2] | ||||||||
| Fee Waiver or Reimbursement | (0.03%) | [3] | ||||||||
| Net Expenses (as a percentage of Assets) | 0.51% | |||||||||
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