v3.26.1
Shareholder Report
 6 Months Ended
Jun. 30, 2026
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Western Asset Funds, Inc.
Entity Central Index Key 0000863520
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Class A  
Shareholder Report [Line Items]  
Fund Name Western Asset Core Plus Bond Fund
Class Name Class A
Trading Symbol WAPAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Western Asset Core Plus Bond Fund for the period  January 1, 2026, to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*,†
Class A
$41
0.82%
[1],[2]
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.82%
Net Assets $ 3,546,198,044
Holdings Count | $ / shares 1,092
Investment Company Portfolio Turnover 93.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$3,546,198,044
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
1092
Portfolio Turnover Rate
93%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [3],[4]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Western Asset Core Plus Bond Fund
Class Name Class C
Trading Symbol WAPCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Western Asset Core Plus Bond Fund for the period  January 1, 2026, to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*,†
Class C
$76
1.54%
[5],[6]
Expenses Paid, Amount $ 76
Expense Ratio, Percent 1.54%
Net Assets $ 3,546,198,044
Holdings Count | $ / shares 1,092
Investment Company Portfolio Turnover 93.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$3,546,198,044
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
1092
Portfolio Turnover Rate
93%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [7],[8]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class FI  
Shareholder Report [Line Items]  
Fund Name Western Asset Core Plus Bond Fund
Class Name Class FI
Trading Symbol WACIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Western Asset Core Plus Bond Fund for the period  January 1, 2026, to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*,†
Class FI
$42
0.84%
[9],[10]
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.84%
Net Assets $ 3,546,198,044
Holdings Count | $ / shares 1,092
Investment Company Portfolio Turnover 93.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$3,546,198,044
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
1092
Portfolio Turnover Rate
93%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [11],[12]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R  
Shareholder Report [Line Items]  
Fund Name Western Asset Core Plus Bond Fund
Class Name Class R
Trading Symbol WAPRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Western Asset Core Plus Bond Fund for the period  January 1, 2026, to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*,†
Class R
$57
1.14%
[13],[14]
Expenses Paid, Amount $ 57
Expense Ratio, Percent 1.14%
Net Assets $ 3,546,198,044
Holdings Count | $ / shares 1,092
Investment Company Portfolio Turnover 93.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$3,546,198,044
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
1092
Portfolio Turnover Rate
93%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [15],[16]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class I  
Shareholder Report [Line Items]  
Fund Name Western Asset Core Plus Bond Fund
Class Name Class I
Trading Symbol WACPX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Western Asset Core Plus Bond Fund for the period  January 1, 2026, to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*,†
Class I
$22
0.45%
[17],[18]
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.45%
Net Assets $ 3,546,198,044
Holdings Count | $ / shares 1,092
Investment Company Portfolio Turnover 93.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$3,546,198,044
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
1092
Portfolio Turnover Rate
93%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [19],[20]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class IS  
Shareholder Report [Line Items]  
Fund Name Western Asset Core Plus Bond Fund
Class Name Class IS
Trading Symbol WAPSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Western Asset Core Plus Bond Fund for the period  January 1, 2026, to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*,†
Class IS
$22
0.44%
[21],[22]
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.44%
Net Assets $ 3,546,198,044
Holdings Count | $ / shares 1,092
Investment Company Portfolio Turnover 93.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$3,546,198,044
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
1092
Portfolio Turnover Rate
93%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [23],[24]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
[1]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[2]
† Annualized.
[3]
* Does not include derivatives, except purchased options, if any.  
[4]
† Certain categories may represent less than 0.1%.
[5]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[6]
† Annualized.
[7]
* Does not include derivatives, except purchased options, if any.  
[8]
† Certain categories may represent less than 0.1%.
[9]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[10]
† Annualized.
[11]
* Does not include derivatives, except purchased options, if any.  
[12]
† Certain categories may represent less than 0.1%.
[13]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[14]
† Annualized.
[15]
* Does not include derivatives, except purchased options, if any.  
[16]
† Certain categories may represent less than 0.1%.
[17]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[18]
† Annualized.
[19]
* Does not include derivatives, except purchased options, if any.  
[20]
† Certain categories may represent less than 0.1%.
[21]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[22]
† Annualized.
[23]
* Does not include derivatives, except purchased options, if any.  
[24]
† Certain categories may represent less than 0.1%.