S000000715 [Member] Annual Fund Operating Expenses - Western Asset Inflation Indexed Plus Bond Fund |
Dec. 31, 2025 |
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|---|---|---|---|---|
| Prospectus [Line Items] | ||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | December 31, 2027 | |||
| Class FI | ||||
| Prospectus [Line Items] | ||||
| Management Fees (as a percentage of Assets) | 0.20% | |||
| Distribution and Service (12b-1) Fees | 0.25% | |||
| Other Expenses (as a percentage of Assets): | 0.79% | |||
| Expenses (as a percentage of Assets) | 1.24% | |||
| Fee Waiver or Reimbursement | (0.39%) | [1] | ||
| Net Expenses (as a percentage of Assets) | 0.85% | |||
| Class I | ||||
| Prospectus [Line Items] | ||||
| Management Fees (as a percentage of Assets) | 0.20% | |||
| Distribution and Service (12b-1) Fees | 0.00% | |||
| Other Expenses (as a percentage of Assets): | 0.68% | |||
| Expenses (as a percentage of Assets) | 0.88% | |||
| Fee Waiver or Reimbursement | [1] | |||
| Net Expenses (as a percentage of Assets) | 0.88% | |||
| Class IS | ||||
| Prospectus [Line Items] | ||||
| Management Fees (as a percentage of Assets) | 0.20% | |||
| Distribution and Service (12b-1) Fees | 0.00% | |||
| Other Expenses (as a percentage of Assets): | 0.57% | |||
| Expenses (as a percentage of Assets) | 0.77% | |||
| Fee Waiver or Reimbursement | [1] | |||
| Net Expenses (as a percentage of Assets) | 0.77% | |||
| CLASS A | ||||
| Prospectus [Line Items] | ||||
| Management Fees (as a percentage of Assets) | 0.20% | |||
| Distribution and Service (12b-1) Fees | 0.25% | |||
| Other Expenses (as a percentage of Assets): | 0.67% | |||
| Expenses (as a percentage of Assets) | 1.12% | |||
| Fee Waiver or Reimbursement | (0.22%) | [1] | ||
| Net Expenses (as a percentage of Assets) | 0.90% | |||
| CLASS C | ||||
| Prospectus [Line Items] | ||||
| Management Fees (as a percentage of Assets) | 0.20% | |||
| Distribution and Service (12b-1) Fees | 1.00% | |||
| Other Expenses (as a percentage of Assets): | 0.71% | |||
| Expenses (as a percentage of Assets) | 1.91% | |||
| Fee Waiver or Reimbursement | (0.26%) | [1] | ||
| Net Expenses (as a percentage of Assets) | 1.65% | |||
| CLASS R | ||||
| Prospectus [Line Items] | ||||
| Management Fees (as a percentage of Assets) | 0.20% | |||
| Distribution and Service (12b-1) Fees | 0.50% | |||
| Other Expenses (as a percentage of Assets): | 1.05% | |||
| Expenses (as a percentage of Assets) | 1.75% | |||
| Fee Waiver or Reimbursement | (0.60%) | [1] | ||
| Net Expenses (as a percentage of Assets) | 1.15% | |||
| Class C1 | ||||
| Prospectus [Line Items] | ||||
| Management Fees (as a percentage of Assets) | 0.20% | |||
| Distribution and Service (12b-1) Fees | 0.75% | |||
| Other Expenses (as a percentage of Assets): | 16.48% | |||
| Expenses (as a percentage of Assets) | 17.43% | |||
| Fee Waiver or Reimbursement | (16.03%) | [1] | ||
| Net Expenses (as a percentage of Assets) | 1.40% | |||
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