v3.26.1
Shareholder Report
 6 Months Ended
Apr. 30, 2026
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Franklin Investors Securities Trust
Entity Central Index Key 0000809707
Entity Investment Company Type N-1A
Document Period End Date Apr. 30, 2026
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin Convertible Securities Fund
Class Name Class A
Trading Symbol FISCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Convertible Securities Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$42
0.83%
[1],[2]
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.83%
Net Assets $ 2,954,299,347
Holdings Count | $ / shares 74
Investment Company Portfolio Turnover 5.54%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$2,954,299,347
Total Number of Portfolio Holdings
74
Portfolio Turnover Rate
5.54%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [3]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin Convertible Securities Fund
Class Name Class C
Trading Symbol FROTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Convertible Securities Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$80
1.57%
[4],[5]
Expenses Paid, Amount $ 80
Expense Ratio, Percent 1.57%
Net Assets $ 2,954,299,347
Holdings Count | $ / shares 74
Investment Company Portfolio Turnover 5.54%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$2,954,299,347
Total Number of Portfolio Holdings
74
Portfolio Turnover Rate
5.54%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [6]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin Convertible Securities Fund
Class Name Class R6
Trading Symbol FCSKX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Convertible Securities Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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 R6
$26
0.50%
[7],[8]
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.50%
Net Assets $ 2,954,299,347
Holdings Count | $ / shares 74
Investment Company Portfolio Turnover 5.54%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$2,954,299,347
Total Number of Portfolio Holdings
74
Portfolio Turnover Rate
5.54%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [9]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin Convertible Securities Fund
Class Name Advisor Class
Trading Symbol FCSZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Convertible Securities Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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*,†
Advisor Class
$30
0.58%
[10],[11]
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.58%
Net Assets $ 2,954,299,347
Holdings Count | $ / shares 74
Investment Company Portfolio Turnover 5.54%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$2,954,299,347
Total Number of Portfolio Holdings
74
Portfolio Turnover Rate
5.54%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [12]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin Equity Income Fund
Class Name Class A
Trading Symbol FISEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Equity Income Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$42
0.81%
[13],[14]
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.81%
Net Assets $ 4,826,532,503
Holdings Count | $ / shares 89
Investment Company Portfolio Turnover 23.36%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$4,826,532,503
Total Number of Portfolio Holdings
89
Portfolio Turnover Rate
23.36%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [15]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin Equity Income Fund
Class Name Class C
Trading Symbol FRETX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Equity Income Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$81
1.56%
[16],[17]
Expenses Paid, Amount $ 81
Expense Ratio, Percent 1.56%
Net Assets $ 4,826,532,503
Holdings Count | $ / shares 89
Investment Company Portfolio Turnover 23.36%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$4,826,532,503
Total Number of Portfolio Holdings
89
Portfolio Turnover Rate
23.36%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [18]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R  
Shareholder Report [Line Items]  
Fund Name Franklin Equity Income Fund
Class Name Class R
Trading Symbol FREIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Equity Income Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$55
1.06%
[19],[20]
Expenses Paid, Amount $ 55
Expense Ratio, Percent 1.06%
Net Assets $ 4,826,532,503
Holdings Count | $ / shares 89
Investment Company Portfolio Turnover 23.36%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$4,826,532,503
Total Number of Portfolio Holdings
89
Portfolio Turnover Rate
23.36%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [21]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin Equity Income Fund
Class Name Class R6
Trading Symbol FEIQX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Equity Income Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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 R6
$26
0.50%
[22],[23]
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.50%
Net Assets $ 4,826,532,503
Holdings Count | $ / shares 89
Investment Company Portfolio Turnover 23.36%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$4,826,532,503
Total Number of Portfolio Holdings
89
Portfolio Turnover Rate
23.36%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [24]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin Equity Income Fund
Class Name Advisor Class
Trading Symbol FEIFX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Equity Income Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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*,†
Advisor Class
$29
0.56%
[25],[26]
Expenses Paid, Amount $ 29
Expense Ratio, Percent 0.56%
Net Assets $ 4,826,532,503
Holdings Count | $ / shares 89
Investment Company Portfolio Turnover 23.36%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$4,826,532,503
Total Number of Portfolio Holdings
89
Portfolio Turnover Rate
23.36%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [27]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin Floating Rate Daily Access Fund
Class Name Class A
Trading Symbol FAFRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Floating Rate Daily Access Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$47
0.95%
[28],[29]
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.95%
Net Assets $ 1,194,366,972
Holdings Count | $ / shares 273
Investment Company Portfolio Turnover 13.94%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$1,194,366,972
Total Number of Portfolio Holdings
273
Portfolio Turnover Rate
13.94%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [30],[31]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin Floating Rate Daily Access Fund
Class Name Class C
Trading Symbol FCFRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Floating Rate Daily Access Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$67
1.35%
[32],[33]
Expenses Paid, Amount $ 67
Expense Ratio, Percent 1.35%
Net Assets $ 1,194,366,972
Holdings Count | $ / shares 273
Investment Company Portfolio Turnover 13.94%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$1,194,366,972
Total Number of Portfolio Holdings
273
Portfolio Turnover Rate
13.94%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [34],[35]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin Floating Rate Daily Access Fund
Class Name Class R6
Trading Symbol FFRDX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Floating Rate Daily Access Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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 R6
$31
0.62%
[36],[37]
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.62%
Net Assets $ 1,194,366,972
Holdings Count | $ / shares 273
Investment Company Portfolio Turnover 13.94%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$1,194,366,972
Total Number of Portfolio Holdings
273
Portfolio Turnover Rate
13.94%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [38],[39]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin Floating Rate Daily Access Fund
Class Name Advisor Class
Trading Symbol FDAAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Floating Rate Daily Access Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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*,†
Advisor Class
$35
0.70%
[40],[41]
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.70%
Net Assets $ 1,194,366,972
Holdings Count | $ / shares 273
Investment Company Portfolio Turnover 13.94%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$1,194,366,972
Total Number of Portfolio Holdings
273
Portfolio Turnover Rate
13.94%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [42],[43]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin Long Duration Credit Fund
Class Name Class R6
Trading Symbol FLDBX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Long Duration Credit Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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 R6
$15
0.30%
[44],[45]
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.30%
Net Assets $ 62,174,186
Holdings Count | $ / shares 352
Investment Company Portfolio Turnover 27.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$62,174,186
Total Number of Portfolio Holdings
352
Portfolio Turnover Rate
27%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*  (% of Total Investments)
image
 [46]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin Low Duration Total Return Fund
Class Name Class A
Trading Symbol FLDAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Low Duration Total Return Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$33
0.66%
[47],[48]
Expenses Paid, Amount $ 33
Expense Ratio, Percent 0.66%
Net Assets $ 1,857,826,709
Holdings Count | $ / shares 769
Investment Company Portfolio Turnover 33.73%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$1,857,826,709
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
769
Portfolio Turnover Rate
33.73%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [49],[50]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin Low Duration Total Return Fund
Class Name Class C
Trading Symbol FLDCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Low Duration Total Return Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$53
1.07%
[51],[52]
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.07%
Net Assets $ 1,857,826,709
Holdings Count | $ / shares 769
Investment Company Portfolio Turnover 33.73%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$1,857,826,709
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
769
Portfolio Turnover Rate
33.73%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [53],[54]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R  
Shareholder Report [Line Items]  
Fund Name Franklin Low Duration Total Return Fund
Class Name Class R
Trading Symbol FLDRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Low Duration Total Return Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$45
0.91%
[55],[56]
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.91%
Net Assets $ 1,857,826,709
Holdings Count | $ / shares 769
Investment Company Portfolio Turnover 33.73%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$1,857,826,709
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
769
Portfolio Turnover Rate
33.73%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [57],[58]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin Low Duration Total Return Fund
Class Name Class R6
Trading Symbol FLRRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Low Duration Total Return Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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 R6
$15
0.30%
[59],[60]
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.30%
Net Assets $ 1,857,826,709
Holdings Count | $ / shares 769
Investment Company Portfolio Turnover 33.73%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$1,857,826,709
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
769
Portfolio Turnover Rate
33.73%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [61],[62]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin Low Duration Total Return Fund
Class Name Advisor Class
Trading Symbol FLDZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Low Duration Total Return Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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*,†
Advisor Class
$20
0.41%
[63],[64]
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.41%
Net Assets $ 1,857,826,709
Holdings Count | $ / shares 769
Investment Company Portfolio Turnover 33.73%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$1,857,826,709
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
769
Portfolio Turnover Rate
33.73%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [65],[66]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin Low Duration U.S. Government Securities Fund
Class Name Class A
Trading Symbol FISAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Low Duration U.S. Government Securities Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$42
0.83%
[67],[68]
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.83%
Net Assets $ 380,282,579
Holdings Count | $ / shares 1,192
Investment Company Portfolio Turnover 16.94%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$380,282,579
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
1,192
Portfolio Turnover Rate
16.94%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [69]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A1  
Shareholder Report [Line Items]  
Fund Name Franklin Low Duration U.S. Government Securities Fund
Class Name Class A1
Trading Symbol FAUGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Low Duration U.S. Government Securities Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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 A1
$34
0.68%
[70],[71]
Expenses Paid, Amount $ 34
Expense Ratio, Percent 0.68%
Net Assets $ 380,282,579
Holdings Count | $ / shares 1,192
Investment Company Portfolio Turnover 16.94%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$380,282,579
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
1,192
Portfolio Turnover Rate
16.94%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [72]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin Low Duration U.S. Government Securities Fund
Class Name Class C
Trading Symbol FCSCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Low Duration U.S. Government Securities Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$61
1.23%
[73],[74]
Expenses Paid, Amount $ 61
Expense Ratio, Percent 1.23%
Net Assets $ 380,282,579
Holdings Count | $ / shares 1,192
Investment Company Portfolio Turnover 16.94%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$380,282,579
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
1,192
Portfolio Turnover Rate
16.94%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [75]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin Low Duration U.S. Government Securities Fund
Class Name Class R6
Trading Symbol FAURX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Low Duration U.S. Government Securities Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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 R6
$28
0.55%
[76],[77]
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.55%
Net Assets $ 380,282,579
Holdings Count | $ / shares 1,192
Investment Company Portfolio Turnover 16.94%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$380,282,579
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
1,192
Portfolio Turnover Rate
16.94%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [78]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin Low Duration U.S. Government Securities Fund
Class Name Advisor Class
Trading Symbol FAUZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Low Duration U.S. Government Securities Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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*,†
Advisor Class
$29
0.58%
[79],[80]
Expenses Paid, Amount $ 29
Expense Ratio, Percent 0.58%
Net Assets $ 380,282,579
Holdings Count | $ / shares 1,192
Investment Company Portfolio Turnover 16.94%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$380,282,579
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
1,192
Portfolio Turnover Rate
16.94%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [81]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin Managed Income Fund
Class Name Class A
Trading Symbol FBLAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Managed Income Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$47
0.91%
[82],[83]
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.91%
Net Assets $ 3,466,870,671
Holdings Count | $ / shares 172
Investment Company Portfolio Turnover 13.95%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$3,466,870,671
Total Number of Portfolio Holdings
172
Portfolio Turnover Rate
13.95%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [84]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin Managed Income Fund
Class Name Class C
Trading Symbol FBMCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Managed Income Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$86
1.66%
[85],[86]
Expenses Paid, Amount $ 86
Expense Ratio, Percent 1.66%
Net Assets $ 3,466,870,671
Holdings Count | $ / shares 172
Investment Company Portfolio Turnover 13.95%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$3,466,870,671
Total Number of Portfolio Holdings
172
Portfolio Turnover Rate
13.95%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [87]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R  
Shareholder Report [Line Items]  
Fund Name Franklin Managed Income Fund
Class Name Class R
Trading Symbol FBFQX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Managed Income Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$60
1.16%
[88],[89]
Expenses Paid, Amount $ 60
Expense Ratio, Percent 1.16%
Net Assets $ 3,466,870,671
Holdings Count | $ / shares 172
Investment Company Portfolio Turnover 13.95%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$3,466,870,671
Total Number of Portfolio Holdings
172
Portfolio Turnover Rate
13.95%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [90]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin Managed Income Fund
Class Name Class R6
Trading Symbol FBFRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Managed Income Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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 R6
$31
0.59%
[91],[92]
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.59%
Net Assets $ 3,466,870,671
Holdings Count | $ / shares 172
Investment Company Portfolio Turnover 13.95%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$3,466,870,671
Total Number of Portfolio Holdings
172
Portfolio Turnover Rate
13.95%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [93]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin Managed Income Fund
Class Name Advisor Class
Trading Symbol FBFZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Managed Income Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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*,†
Advisor Class
$34
0.66%
[94],[95]
Expenses Paid, Amount $ 34
Expense Ratio, Percent 0.66%
Net Assets $ 3,466,870,671
Holdings Count | $ / shares 172
Investment Company Portfolio Turnover 13.95%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$3,466,870,671
Total Number of Portfolio Holdings
172
Portfolio Turnover Rate
13.95%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [96]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin Total Return Fund
Class Name Class A
Trading Symbol FKBAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Total Return Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$36
0.72%
[97],[98]
Expenses Paid, Amount $ 36
Expense Ratio, Percent 0.72%
Net Assets $ 2,864,696,216
Holdings Count | $ / shares 976
Investment Company Portfolio Turnover 154.60%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$2,864,696,216
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
976
Portfolio Turnover Rate
154.60%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [99],[100]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin Total Return Fund
Class Name Class C
Trading Symbol FCTLX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Total Return Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$56
1.12%
[101],[102]
Expenses Paid, Amount $ 56
Expense Ratio, Percent 1.12%
Net Assets $ 2,864,696,216
Holdings Count | $ / shares 976
Investment Company Portfolio Turnover 154.60%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$2,864,696,216
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
976
Portfolio Turnover Rate
154.60%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [103],[104]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R  
Shareholder Report [Line Items]  
Fund Name Franklin Total Return Fund
Class Name Class R
Trading Symbol FTRRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Total Return Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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
$48
0.97%
[105],[106]
Expenses Paid, Amount $ 48
Expense Ratio, Percent 0.97%
Net Assets $ 2,864,696,216
Holdings Count | $ / shares 976
Investment Company Portfolio Turnover 154.60%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$2,864,696,216
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
976
Portfolio Turnover Rate
154.60%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [107],[108]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin Total Return Fund
Class Name Class R6
Trading Symbol FRERX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Total Return Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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 R6
$18
0.37%
[109],[110]
Expenses Paid, Amount $ 18
Expense Ratio, Percent 0.37%
Net Assets $ 2,864,696,216
Holdings Count | $ / shares 976
Investment Company Portfolio Turnover 154.60%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$2,864,696,216
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
976
Portfolio Turnover Rate
154.60%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [111],[112]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin Total Return Fund
Class Name Advisor Class
Trading Symbol FBDAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Total Return Fund for the period November 1, 2025, to April 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 (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
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*,†
Advisor Class
$23
0.47%
[113],[114]
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.47%
Net Assets $ 2,864,696,216
Holdings Count | $ / shares 976
Investment Company Portfolio Turnover 154.60%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Total Net Assets
$2,864,696,216
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
976
Portfolio Turnover Rate
154.60%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of April 30, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [115],[116]
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]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[5]
† Annualized.
[6]
* Does not include derivatives, except purchased options, if any.  
[7]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[8]
† Annualized.
[9]
* Does not include derivatives, except purchased options, if any.  
[10]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[11]
† Annualized.
[12]
* Does not include derivatives, except purchased options, if any.  
[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]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[17]
† Annualized.
[18]
* Does not include derivatives, except purchased options, if any.  
[19]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[20]
† Annualized.
[21]
* Does not include derivatives, except purchased options, if any.  
[22]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[23]
† Annualized.
[24]
* Does not include derivatives, except purchased options, if any.  
[25]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[26]
† Annualized.
[27]
* Does not include derivatives, except purchased options, if any.  
[28]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[29]
† Annualized.
[30]
* Does not include derivatives, except purchased options, if any.  
[31]
† Certain categories may represent less than 0.1%.
[32]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[33]
† Annualized.
[34]
* Does not include derivatives, except purchased options, if any.  
[35]
† Certain categories may represent less than 0.1%.
[36]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[37]
† Annualized.
[38]
* Does not include derivatives, except purchased options, if any.  
[39]
† Certain categories may represent less than 0.1%.
[40]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[41]
† Annualized.
[42]
* Does not include derivatives, except purchased options, if any.  
[43]
† Certain categories may represent less than 0.1%.
[44]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[45]
† Annualized.
[46]
* Does not include derivatives, except purchased options, if any.  
[47]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[48]
† Annualized.
[49]
* Does not include derivatives, except purchased options, if any.  
[50]
† Certain categories may represent less than 0.1%.
[51]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[52]
† Annualized.
[53]
* Does not include derivatives, except purchased options, if any.  
[54]
† Certain categories may represent less than 0.1%.
[55]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[56]
† Annualized.
[57]
* Does not include derivatives, except purchased options, if any.  
[58]
† Certain categories may represent less than 0.1%.
[59]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[60]
† Annualized.
[61]
* Does not include derivatives, except purchased options, if any.  
[62]
† Certain categories may represent less than 0.1%.
[63]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[64]
† Annualized.
[65]
* Does not include derivatives, except purchased options, if any.  
[66]
† Certain categories may represent less than 0.1%.
[67]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[68]
† Annualized.
[69]
* Does not include derivatives, except purchased options, if any.  
[70]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[71]
† Annualized.
[72]
* Does not include derivatives, except purchased options, if any.  
[73]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[74]
† Annualized.
[75]
* Does not include derivatives, except purchased options, if any.  
[76]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[77]
† Annualized.
[78]
* Does not include derivatives, except purchased options, if any.  
[79]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[80]
† Annualized.
[81]
* Does not include derivatives, except purchased options, if any.  
[82]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[83]
† Annualized.
[84]
* Does not include derivatives, except purchased options, if any.  
[85]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[86]
† Annualized.
[87]
* Does not include derivatives, except purchased options, if any.  
[88]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[89]
† Annualized.
[90]
* Does not include derivatives, except purchased options, if any.  
[91]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[92]
† Annualized.
[93]
* Does not include derivatives, except purchased options, if any.  
[94]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[95]
† Annualized.
[96]
* Does not include derivatives, except purchased options, if any.  
[97]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[98]
† Annualized.
[99]
* Does not include derivatives, except purchased options, if any.  
[100]
† Certain categories may represent less than 0.1%.
[101]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[102]
† Annualized.
[103]
* Does not include derivatives, except purchased options, if any.  
[104]
† Certain categories may represent less than 0.1%.
[105]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[106]
† Annualized.
[107]
* Does not include derivatives, except purchased options, if any.  
[108]
† Certain categories may represent less than 0.1%.
[109]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[110]
† Annualized.
[111]
* Does not include derivatives, except purchased options, if any.  
[112]
† Certain categories may represent less than 0.1%.
[113]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[114]
† Annualized.
[115]
* Does not include derivatives, except purchased options, if any.  
[116]
† Certain categories may represent less than 0.1%.