S000000713 [Member] Annual Fund Operating Expenses - Western Asset Core 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 R | ||||||
| Prospectus [Line Items] | ||||||
| Management Fees (as a percentage of Assets) | 0.42% | |||||
| Distribution and Service (12b-1) Fees | 0.50% | |||||
| Other Expenses (as a percentage of Assets): | 0.22% | |||||
| Expenses (as a percentage of Assets) | 1.14% | |||||
| Fee Waiver or Reimbursement | [1] | |||||
| Net Expenses (as a percentage of Assets) | 1.14% | |||||
| Class I | ||||||
| Prospectus [Line Items] | ||||||
| Management Fees (as a percentage of Assets) | 0.42% | |||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||
| Other Expenses (as a percentage of Assets): | 0.01% | [2] | ||||
| Expenses (as a percentage of Assets) | 0.43% | |||||
| Fee Waiver or Reimbursement | [1] | |||||
| Net Expenses (as a percentage of Assets) | 0.43% | |||||
| Class IS | ||||||
| Prospectus [Line Items] | ||||||
| Management Fees (as a percentage of Assets) | 0.42% | |||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||
| Other Expenses (as a percentage of Assets): | 0.02% | |||||
| Expenses (as a percentage of Assets) | 0.44% | |||||
| Fee Waiver or Reimbursement | (0.02%) | [1] | ||||
| Net Expenses (as a percentage of Assets) | 0.42% | |||||
| Class A | ||||||
| Prospectus [Line Items] | ||||||
| Management Fees (as a percentage of Assets) | 0.42% | |||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||
| Other Expenses (as a percentage of Assets): | 0.15% | |||||
| Expenses (as a percentage of Assets) | 0.82% | |||||
| Fee Waiver or Reimbursement | [1] | |||||
| Net Expenses (as a percentage of Assets) | 0.82% | |||||
| Class C | ||||||
| Prospectus [Line Items] | ||||||
| Management Fees (as a percentage of Assets) | 0.42% | |||||
| Distribution and Service (12b-1) Fees | 1.00% | |||||
| Other Expenses (as a percentage of Assets): | 0.12% | |||||
| Expenses (as a percentage of Assets) | 1.54% | |||||
| Fee Waiver or Reimbursement | [1] | |||||
| Net Expenses (as a percentage of Assets) | 1.54% | |||||
| Class C1 | ||||||
| Prospectus [Line Items] | ||||||
| Management Fees (as a percentage of Assets) | 0.42% | |||||
| Distribution and Service (12b-1) Fees | 0.70% | |||||
| Other Expenses (as a percentage of Assets): | 1.76% | |||||
| Expenses (as a percentage of Assets) | 2.88% | |||||
| Fee Waiver or Reimbursement | (1.46%) | [1] | ||||
| Net Expenses (as a percentage of Assets) | 1.42% | |||||
| Class FI | ||||||
| Prospectus [Line Items] | ||||||
| Management Fees (as a percentage of Assets) | 0.42% | |||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||
| Other Expenses (as a percentage of Assets): | 0.13% | |||||
| Expenses (as a percentage of Assets) | 0.80% | |||||
| Fee Waiver or Reimbursement | [1] | |||||
| Net Expenses (as a percentage of Assets) | 0.80% | |||||
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