S000012738 [Member] Annual Fund Operating Expenses - Western Asset Total Return Unconstrained Fund |
May 31, 2025 |
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| Prospectus [Line Items] | ||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | December 31, 2026 | |||||||
| Class R | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.60% | |||||||
| Distribution and Service (12b-1) Fees | 0.50% | |||||||
| Other Expenses (as a percentage of Assets): | 0.45% | |||||||
| Acquired Fund Fees and Expenses | 0.02% | |||||||
| Expenses (as a percentage of Assets) | 1.57% | [1] | ||||||
| Fee Waiver or Reimbursement | (0.20%) | [2] | ||||||
| Net Expenses (as a percentage of Assets) | 1.37% | [3] | ||||||
| Class I | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.60% | |||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||
| Other Expenses (as a percentage of Assets): | 0.30% | |||||||
| Acquired Fund Fees and Expenses | 0.02% | |||||||
| Expenses (as a percentage of Assets) | 0.92% | [1] | ||||||
| Fee Waiver or Reimbursement | (0.15%) | [2] | ||||||
| Net Expenses (as a percentage of Assets) | 0.77% | [3] | ||||||
| Class IS | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.60% | |||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||
| Other Expenses (as a percentage of Assets): | 0.19% | |||||||
| Acquired Fund Fees and Expenses | 0.02% | |||||||
| Expenses (as a percentage of Assets) | 0.81% | [1] | ||||||
| Fee Waiver or Reimbursement | (0.14%) | [2] | ||||||
| Net Expenses (as a percentage of Assets) | 0.67% | [3] | ||||||
| Class A | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.60% | |||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||
| Other Expenses (as a percentage of Assets): | 0.31% | |||||||
| Acquired Fund Fees and Expenses | 0.02% | |||||||
| Expenses (as a percentage of Assets) | 1.18% | [1] | ||||||
| Fee Waiver or Reimbursement | (0.09%) | [2] | ||||||
| Net Expenses (as a percentage of Assets) | 1.09% | [3] | ||||||
| Class C | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.60% | |||||||
| Distribution and Service (12b-1) Fees | 1.00% | |||||||
| Other Expenses (as a percentage of Assets): | 0.31% | |||||||
| Acquired Fund Fees and Expenses | 0.02% | |||||||
| Expenses (as a percentage of Assets) | 1.93% | [1] | ||||||
| Fee Waiver or Reimbursement | (0.11%) | [2] | ||||||
| Net Expenses (as a percentage of Assets) | 1.82% | [3] | ||||||
| Class FI | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.60% | |||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||
| Other Expenses (as a percentage of Assets): | 0.33% | |||||||
| Acquired Fund Fees and Expenses | 0.02% | |||||||
| Expenses (as a percentage of Assets) | 1.20% | [1] | ||||||
| Fee Waiver or Reimbursement | (0.08%) | [2] | ||||||
| Net Expenses (as a percentage of Assets) | 1.12% | [3] | ||||||
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