S000016633 [Member] Annual Fund Operating Expenses - Western Asset New York Municipals Fund |
Mar. 31, 2026 |
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| Prospectus [Line Items] | ||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | December 31, 2027 | |||||||
| Class A | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.45% | |||||||
| Distribution and Service (12b-1) Fees | 0.15% | |||||||
| Component1 Other Expenses | 0.08% | |||||||
| Component2 Other Expenses | 0.17% | |||||||
| Other Expenses (as a percentage of Assets): | 0.25% | |||||||
| Expenses (as a percentage of Assets) | 0.85% | |||||||
| Fee Waiver or Reimbursement | [1] | |||||||
| Net Expenses (as a percentage of Assets) | 0.85% | |||||||
| Class C | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.45% | |||||||
| Distribution and Service (12b-1) Fees | 0.70% | |||||||
| Component1 Other Expenses | 0.08% | |||||||
| Component2 Other Expenses | 0.17% | |||||||
| Other Expenses (as a percentage of Assets): | 0.25% | |||||||
| Expenses (as a percentage of Assets) | 1.40% | |||||||
| Fee Waiver or Reimbursement | [1] | |||||||
| Net Expenses (as a percentage of Assets) | 1.40% | |||||||
| Class I | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.45% | |||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||
| Component1 Other Expenses | 0.08% | |||||||
| Component2 Other Expenses | 0.19% | |||||||
| Other Expenses (as a percentage of Assets): | 0.27% | |||||||
| Expenses (as a percentage of Assets) | 0.72% | |||||||
| Fee Waiver or Reimbursement | (0.09%) | [1] | ||||||
| Net Expenses (as a percentage of Assets) | 0.63% | [2] | ||||||
| Class FI | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.45% | |||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||
| Component1 Other Expenses | 0.08% | |||||||
| Component2 Other Expenses | 0.30% | [3] | ||||||
| Other Expenses (as a percentage of Assets): | 0.38% | |||||||
| Expenses (as a percentage of Assets) | 1.08% | |||||||
| Fee Waiver or Reimbursement | (0.15%) | [1] | ||||||
| Net Expenses (as a percentage of Assets) | 0.93% | [2] | ||||||
| Class IS | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.45% | |||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||
| Component1 Other Expenses | 0.08% | |||||||
| Component2 Other Expenses | 0.10% | [3] | ||||||
| Other Expenses (as a percentage of Assets): | 0.18% | |||||||
| Expenses (as a percentage of Assets) | 0.63% | |||||||
| Fee Waiver or Reimbursement | (0.03%) | [1] | ||||||
| Net Expenses (as a percentage of Assets) | 0.60% | [2] | ||||||
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