XML 41 R2.htm IDEA: XBRL DOCUMENT v3.25.1
Shareholder Report
 6 Months Ended
Mar. 31, 2025
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Franklin Custodian Funds
Entity Central Index Key 0000038721
Entity Investment Company Type N-1A
Document Period End Date Mar. 31, 2025
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin DynaTech Fund
Class Name Class A
Trading Symbol FKDNX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin DynaTech Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$37
0.77%
[1],[2]
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.77%
Net Assets $ 22,409,781,887
Holdings Count | $ / shares 121 [3]
Investment Company Portfolio Turnover 20.76%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$22,409,781,887
Total Number of Portfolio Holdings*
121
Portfolio Turnover Rate
20.76%
[3]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin DynaTech Fund
Class Name Class C
Trading Symbol FDYNX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin DynaTech Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$73
1.52%
[4],[5]
Expenses Paid, Amount $ 73
Expense Ratio, Percent 1.52%
Net Assets $ 22,409,781,887
Holdings Count | $ / shares 121 [6]
Investment Company Portfolio Turnover 20.76%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$22,409,781,887
Total Number of Portfolio Holdings*
121
Portfolio Turnover Rate
20.76%
[6]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R  
Shareholder Report [Line Items]  
Fund Name Franklin DynaTech Fund
Class Name Class R
Trading Symbol FDNRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin DynaTech Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$49
1.02%
[7],[8]
Expenses Paid, Amount $ 49
Expense Ratio, Percent 1.02%
Net Assets $ 22,409,781,887
Holdings Count | $ / shares 121 [9]
Investment Company Portfolio Turnover 20.76%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$22,409,781,887
Total Number of Portfolio Holdings*
121
Portfolio Turnover Rate
20.76%
[9]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin DynaTech Fund
Class Name Class R6
Trading Symbol FDTRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin DynaTech Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$21
0.44%
[10],[11]
Expenses Paid, Amount $ 21
Expense Ratio, Percent 0.44%
Net Assets $ 22,409,781,887
Holdings Count | $ / shares 121 [12]
Investment Company Portfolio Turnover 20.76%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$22,409,781,887
Total Number of Portfolio Holdings*
121
Portfolio Turnover Rate
20.76%
[12]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin DynaTech Fund
Class Name Advisor Class
Trading Symbol FDYZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin DynaTech Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$25
0.52%
[13],[14]
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.52%
Net Assets $ 22,409,781,887
Holdings Count | $ / shares 121 [15]
Investment Company Portfolio Turnover 20.76%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$22,409,781,887
Total Number of Portfolio Holdings*
121
Portfolio Turnover Rate
20.76%
[15]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin Growth Fund
Class Name Class A
Trading Symbol FKGRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Growth Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$37
0.77%
[16],[17]
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.77%
Net Assets $ 16,275,243,960
Holdings Count | $ / shares 97 [18]
Investment Company Portfolio Turnover 4.41%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$16,275,243,960
Total Number of Portfolio Holdings*
97
Portfolio Turnover Rate
4.41%
[18]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin Growth Fund
Class Name Class C
Trading Symbol FRGSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Growth Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$73
1.52%
[19],[20]
Expenses Paid, Amount $ 73
Expense Ratio, Percent 1.52%
Net Assets $ 16,275,243,960
Holdings Count | $ / shares 97 [21]
Investment Company Portfolio Turnover 4.41%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$16,275,243,960
Total Number of Portfolio Holdings*
97
Portfolio Turnover Rate
4.41%
[21]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R  
Shareholder Report [Line Items]  
Fund Name Franklin Growth Fund
Class Name Class R
Trading Symbol FGSRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Growth Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$49
1.02%
[22],[23]
Expenses Paid, Amount $ 49
Expense Ratio, Percent 1.02%
Net Assets $ 16,275,243,960
Holdings Count | $ / shares 97 [24]
Investment Company Portfolio Turnover 4.41%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$16,275,243,960
Total Number of Portfolio Holdings*
97
Portfolio Turnover Rate
4.41%
[24]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin Growth Fund
Class Name Class R6
Trading Symbol FIFRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Growth Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$22
0.45%
[25],[26]
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.45%
Net Assets $ 16,275,243,960
Holdings Count | $ / shares 97 [27]
Investment Company Portfolio Turnover 4.41%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$16,275,243,960
Total Number of Portfolio Holdings*
97
Portfolio Turnover Rate
4.41%
[27]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin Growth Fund
Class Name Advisor Class
Trading Symbol FCGAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Growth Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$25
0.52%
[28],[29]
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.52%
Net Assets $ 16,275,243,960
Holdings Count | $ / shares 97 [30]
Investment Company Portfolio Turnover 4.41%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$16,275,243,960
Total Number of Portfolio Holdings*
97
Portfolio Turnover Rate
4.41%
[30]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin Income Fund
Class Name Class A
Trading Symbol FKIQX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Income Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$35
0.70%
[31],[32]
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.70%
Net Assets $ 73,503,470,536
Holdings Count | $ / shares 563 [33]
Investment Company Portfolio Turnover 28.54%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$73,503,470,536
Total Number of Portfolio Holdings*
563
Portfolio Turnover Rate
28.54%
[33]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A1  
Shareholder Report [Line Items]  
Fund Name Franklin Income Fund
Class Name Class A1
Trading Symbol FKINX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Income Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$30
0.60%
[34],[35]
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.60%
Net Assets $ 73,503,470,536
Holdings Count | $ / shares 563 [36]
Investment Company Portfolio Turnover 28.54%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$73,503,470,536
Total Number of Portfolio Holdings*
563
Portfolio Turnover Rate
28.54%
[36]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin Income Fund
Class Name Class C
Trading Symbol FCISX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Income Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$55
1.10%
[37],[38]
Expenses Paid, Amount $ 55
Expense Ratio, Percent 1.10%
Net Assets $ 73,503,470,536
Holdings Count | $ / shares 563 [39]
Investment Company Portfolio Turnover 28.54%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$73,503,470,536
Total Number of Portfolio Holdings*
563
Portfolio Turnover Rate
28.54%
[39]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R  
Shareholder Report [Line Items]  
Fund Name Franklin Income Fund
Class Name Class R
Trading Symbol FISRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Income Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$47
0.95%
[40],[41]
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.95%
Net Assets $ 73,503,470,536
Holdings Count | $ / shares 563 [42]
Investment Company Portfolio Turnover 28.54%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$73,503,470,536
Total Number of Portfolio Holdings*
563
Portfolio Turnover Rate
28.54%
[42]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin Income Fund
Class Name Class R6
Trading Symbol FNCFX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Income Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$20
0.40%
[43],[44]
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.40%
Net Assets $ 73,503,470,536
Holdings Count | $ / shares 563 [45]
Investment Company Portfolio Turnover 28.54%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$73,503,470,536
Total Number of Portfolio Holdings*
563
Portfolio Turnover Rate
28.54%
[45]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin Income Fund
Class Name Advisor Class
Trading Symbol FRIAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Income Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$22
0.45%
[46],[47]
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.45%
Net Assets $ 73,503,470,536
Holdings Count | $ / shares 563 [48]
Investment Company Portfolio Turnover 28.54%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$73,503,470,536
Total Number of Portfolio Holdings*
563
Portfolio Turnover Rate
28.54%
[48]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin U.S. Government Securities Fund
Class Name Class A
Trading Symbol FKFSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin U.S. Government Securities Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$43
0.86%
[49],[50]
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.86%
Net Assets $ 2,196,861,351
Holdings Count | $ / shares 618 [51]
Investment Company Portfolio Turnover 13.97%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$2,196,861,351
Total Number of Portfolio Holdings*
618
Portfolio Turnover Rate
13.97%
[51]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A1  
Shareholder Report [Line Items]  
Fund Name Franklin U.S. Government Securities Fund
Class Name Class A1
Trading Symbol FKUSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin U.S. Government Securities Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$37
0.75%
[52],[53]
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.75%
Net Assets $ 2,196,861,351
Holdings Count | $ / shares 618 [54]
Investment Company Portfolio Turnover 13.97%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$2,196,861,351
Total Number of Portfolio Holdings*
618
Portfolio Turnover Rate
13.97%
[54]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin U.S. Government Securities Fund
Class Name Class C
Trading Symbol FRUGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin U.S. Government Securities Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$63
1.26%
[55],[56]
Expenses Paid, Amount $ 63
Expense Ratio, Percent 1.26%
Net Assets $ 2,196,861,351
Holdings Count | $ / shares 618 [57]
Investment Company Portfolio Turnover 13.97%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$2,196,861,351
Total Number of Portfolio Holdings*
618
Portfolio Turnover Rate
13.97%
[57]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R  
Shareholder Report [Line Items]  
Fund Name Franklin U.S. Government Securities Fund
Class Name Class R
Trading Symbol FUSRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin U.S. Government Securities Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
1.11%
[58],[59]
Expenses Paid, Amount $ 55
Expense Ratio, Percent 1.11%
Net Assets $ 2,196,861,351
Holdings Count | $ / shares 618 [60]
Investment Company Portfolio Turnover 13.97%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$2,196,861,351
Total Number of Portfolio Holdings*
618
Portfolio Turnover Rate
13.97%
[60]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin U.S. Government Securities Fund
Class Name Class R6
Trading Symbol FGORX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin U.S. Government Securities Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$25
0.51%
[61],[62]
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.51%
Net Assets $ 2,196,861,351
Holdings Count | $ / shares 618 [63]
Investment Company Portfolio Turnover 13.97%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$2,196,861,351
Total Number of Portfolio Holdings*
618
Portfolio Turnover Rate
13.97%
[63]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin U.S. Government Securities Fund
Class Name Advisor Class
Trading Symbol FUSAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin U.S. Government Securities Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
0.61%
[64],[65]
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.61%
Net Assets $ 2,196,861,351
Holdings Count | $ / shares 618 [66]
Investment Company Portfolio Turnover 13.97%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$2,196,861,351
Total Number of Portfolio Holdings*
618
Portfolio Turnover Rate
13.97%
[66]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin Utilities Fund
Class Name Class A
Trading Symbol FKUQX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Utilities Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$41
0.81%
[67],[68]
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.81%
Net Assets $ 6,639,997,105
Holdings Count | $ / shares 45 [69]
Investment Company Portfolio Turnover 6.48%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$6,639,997,105
Total Number of Portfolio Holdings*
45
Portfolio Turnover Rate
6.48%
[69]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A1  
Shareholder Report [Line Items]  
Fund Name Franklin Utilities Fund
Class Name Class A1
Trading Symbol FKUTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Utilities Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$36
0.71%
[70],[71]
Expenses Paid, Amount $ 36
Expense Ratio, Percent 0.71%
Net Assets $ 6,639,997,105
Holdings Count | $ / shares 45 [72]
Investment Company Portfolio Turnover 6.48%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$6,639,997,105
Total Number of Portfolio Holdings*
45
Portfolio Turnover Rate
6.48%
[72]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin Utilities Fund
Class Name Class C
Trading Symbol FRUSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Utilities Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
1.21%
[73],[74]
Expenses Paid, Amount $ 61
Expense Ratio, Percent 1.21%
Net Assets $ 6,639,997,105
Holdings Count | $ / shares 45 [75]
Investment Company Portfolio Turnover 6.48%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$6,639,997,105
Total Number of Portfolio Holdings*
45
Portfolio Turnover Rate
6.48%
[75]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R  
Shareholder Report [Line Items]  
Fund Name Franklin Utilities Fund
Class Name Class R
Trading Symbol FRURX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Utilities Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$53
1.06%
[76],[77]
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.06%
Net Assets $ 6,639,997,105
Holdings Count | $ / shares 45 [78]
Investment Company Portfolio Turnover 6.48%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$6,639,997,105
Total Number of Portfolio Holdings*
45
Portfolio Turnover Rate
6.48%
[78]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin Utilities Fund
Class Name Class R6
Trading Symbol FUFRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Utilities Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$25
0.50%
[79],[80]
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.50%
Net Assets $ 6,639,997,105
Holdings Count | $ / shares 45 [81]
Investment Company Portfolio Turnover 6.48%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$6,639,997,105
Total Number of Portfolio Holdings*
45
Portfolio Turnover Rate
6.48%
[81]
Holdings [Text Block]
image
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin Utilities Fund
Class Name Advisor Class
Trading Symbol FRUAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin Utilities Fund for the period October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
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
$28
0.56%
[82],[83]
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.56%
Net Assets $ 6,639,997,105
Holdings Count | $ / shares 45 [84]
Investment Company Portfolio Turnover 6.48%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Total Net Assets
$6,639,997,105
Total Number of Portfolio Holdings*
45
Portfolio Turnover Rate
6.48%
[84]
Holdings [Text Block]
image
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]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[32]
† Annualized.
[33]
* Does not include derivatives, except purchased options, if any.  
[34]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[35]
† Annualized.
[36]
* Does not include derivatives, except purchased options, if any.  
[37]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[38]
† Annualized.
[39]
* Does not include derivatives, except purchased options, if any.  
[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]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[44]
† Annualized.
[45]
* Does not include derivatives, except purchased options, if any.  
[46]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[47]
† Annualized.
[48]
* Does not include derivatives, except purchased options, if any.  
[49]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[50]
† Annualized.
[51]
* Does not include derivatives, except purchased options, if any.  
[52]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[53]
† Annualized.
[54]
* Does not include derivatives, except purchased options, if any.  
[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]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[59]
† Annualized.
[60]
* Does not include derivatives, except purchased options, if any.  
[61]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[62]
† Annualized.
[63]
* Does not include derivatives, except purchased options, if any.  
[64]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[65]
† Annualized.
[66]
* Does not include derivatives, except purchased options, if any.  
[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.