| Shareholder Report | 12 Months Ended |
| Jun. 30, 2024 USD ($) $ / shares |
| Shareholder Report [Line Items] | | |
| Document Type | N-CSR | |
| Amendment Flag | false | |
| Registrant Name | Franklin
U.S. Government Money Fund | |
| Entity Central Index Key | 0000038778 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | Jun. 30, 2024 | |
| Class A | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Franklin
U.S. Government Money Fund | |
| Class Name | Class
A | |
| Trading Symbol | FMFXX | |
| Annual or Semi-Annual Statement [Text Block] | This
annual
shareholder report
contains important information about Franklin
U.S. Government Money Fund for the period July
1, 2023, to June 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | 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 YEAR? (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 1
$52
0.51% | [1] |
| Expenses Paid, Amount | $ 52 | [1] |
| Expense Ratio, Percent | 0.51% | [1] |
| Factors Affecting Performance [Text Block] | HOW
DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? As of June 30, 2024, the seven-day
current yield for Class A shares
of the Franklin U.S. Government Money Fund was 4.68%
and the seven-day effective
yield was 4.79%. The seven-day
current yield represents net interest income generated by the Fund’s investments
for the past seven days and assumes income is generated each week over a 365-day period. The seven-day effective yield
assumes reinvestment of the coupon (interest payments) and will typically be slightly higher than the current yield because of the
compounding effect on investment returns. The Fund’s performance
was mainly driven by the high levels of income provided by short-term interest rates. There were no significant
credit events that would have impacted the Fund’s returns. | |
| Performance Past Does Not Indicate Future [Text] | The
Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. | |
| Updated Performance Information Location [Text Block] | For current month-end performance,
please call Franklin Templeton at (800)
DIAL BEN/342-5236 or visit https://www.franklintempleton.com/investments/options/mutual-funds . | |
| Net Assets | $ 5,029,041,874 | |
| Holdings Count | $ / shares | 88 | [2] |
| Advisory Fees Paid, Amount | $ 14,396,608 | |
| Additional Fund Statistics [Text Block] | KEY
FUND STATISTICS (as
of June 30, 2024)
Total
Net Assets
$5,029,041,874
Total
Number of Portfolio Holdings *
88
Total
Administrative Fee Paid
$14,396,608 | [2] |
| Holdings [Text Block] | | |
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class C | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Franklin
U.S. Government Money Fund | |
| Class Name | Class
C | |
| Trading Symbol | FTQXX | |
| Annual or Semi-Annual Statement [Text Block] | This
annual
shareholder report
contains important information about Franklin
U.S. Government Money Fund for the period July
1, 2023, to June 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | 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 YEAR? (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 1
$118
1.16% | [3] |
| Expenses Paid, Amount | $ 118 | [3] |
| Expense Ratio, Percent | 1.16% | [3] |
| Factors Affecting Performance [Text Block] | HOW
DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? As of June 30, 2024, the seven-day
current yield for Class C shares
of the Franklin U.S. Government Money Fund was 3.98%
and the seven-day effective
yield was 4.06%. The seven-day
current yield represents net interest income generated by the Fund’s investments
for the past seven days and assumes income is generated each week over a 365-day period. The seven-day effective yield
assumes reinvestment of the coupon (interest payments) and will typically be slightly higher than the current yield because of the
compounding effect on investment returns. The Fund’s performance
was mainly driven by the high levels of income provided by short-term interest rates. There were no significant
credit events that would have impacted the Fund’s returns. | |
| Performance Past Does Not Indicate Future [Text] | The
Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. | |
| Updated Performance Information Location [Text Block] | For current month-end performance,
please call Franklin Templeton at (800)
DIAL BEN/342-5236 or visit https://www.franklintempleton.com/investments/options/mutual-funds . | |
| Net Assets | $ 5,029,041,874 | |
| Holdings Count | $ / shares | 88 | [4] |
| Advisory Fees Paid, Amount | $ 14,396,608 | |
| Additional Fund Statistics [Text Block] | KEY
FUND STATISTICS (as
of June 30, 2024)
Total
Net Assets
$5,029,041,874
Total
Number of Portfolio Holdings *
88
Total
Administrative Fee Paid
$14,396,608 | [4] |
| Holdings [Text Block] | | |
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class R | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Franklin
U.S. Government Money Fund | |
| Class Name | Class
R | |
| Trading Symbol | FRQXX | |
| Annual or Semi-Annual Statement [Text Block] | This
annual
shareholder report
contains important information about Franklin
U.S. Government Money Fund for the period July
1, 2023, to June 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | 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 YEAR? (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 1
$103
1.01% | [5] |
| Expenses Paid, Amount | $ 103 | [5] |
| Expense Ratio, Percent | 1.01% | [5] |
| Factors Affecting Performance [Text Block] | HOW
DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? As of June 30, 2024, the seven-day
current yield for Class R shares
of the Franklin U.S. Government Money Fund was 4.17%
and the seven-day effective
yield was 4.26%. The seven-day
current yield represents net interest income generated by the Fund’s investments
for the past seven days and assumes income is generated each week over a 365-day period. The seven-day effective yield
assumes reinvestment of the coupon (interest payments) and will typically be slightly higher than the current yield because of the
compounding effect on investment returns. The Fund’s performance
was mainly driven by the high levels of income provided by short-term interest rates. There were no significant
credit events that would have impacted the Fund’s returns. | |
| Performance Past Does Not Indicate Future [Text] | The
Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. | |
| Updated Performance Information Location [Text Block] | For current month-end performance,
please call Franklin Templeton at (800)
DIAL BEN/342-5236 or visit https://www.franklintempleton.com/investments/options/mutual-funds . | |
| Net Assets | $ 5,029,041,874 | |
| Holdings Count | $ / shares | 88 | [6] |
| Advisory Fees Paid, Amount | $ 14,396,608 | |
| Additional Fund Statistics [Text Block] | KEY
FUND STATISTICS (as
of June 30, 2024)
Total
Net Assets
$5,029,041,874
Total
Number of Portfolio Holdings *
88
Total
Administrative Fee Paid
$14,396,608 | [6] |
| Holdings [Text Block] | | |
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class R6 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Franklin
U.S. Government Money Fund | |
| Class Name | Class
R6 | |
| Trading Symbol | FRRXX | |
| Annual or Semi-Annual Statement [Text Block] | This
annual
shareholder report
contains important information about Franklin
U.S. Government Money Fund for the period July
1, 2023, to June 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | 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 YEAR? (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 1
$47
0.46% | [7],[8] |
| Expenses Paid, Amount | $ 47 | [7] |
| Expense Ratio, Percent | 0.46% | [7] |
| Factors Affecting Performance [Text Block] | HOW
DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? As of June 30, 2024, the seven-day
current yield for Class R6
shares of the Franklin U.S. Government Money Fund was 4.74%
and the seven-day effective
yield was 4.85%. The seven-day
current yield represents net interest income generated by the Fund’s investments
for the past seven days and assumes income is generated each week over a 365-day period. The seven-day effective yield
assumes reinvestment of the coupon (interest payments) and will typically be slightly higher than the current yield because of the
compounding effect on investment returns. The Fund’s performance
was mainly driven by the high levels of income provided by short-term interest rates. There were no significant
credit events that would have impacted the Fund’s returns. | |
| Performance Past Does Not Indicate Future [Text] | The
Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. | |
| Updated Performance Information Location [Text Block] | For current month-end performance,
please call Franklin Templeton at (800)
DIAL BEN/342-5236 or visit https://www.franklintempleton.com/investments/options/mutual-funds . | |
| Net Assets | $ 5,029,041,874 | |
| Holdings Count | $ / shares | 88 | [9] |
| Advisory Fees Paid, Amount | $ 14,396,608 | |
| Additional Fund Statistics [Text Block] | KEY
FUND STATISTICS (as
of June 30, 2024)
Total
Net Assets
$5,029,041,874
Total
Number of Portfolio Holdings *
88
Total
Administrative Fee Paid
$14,396,608 | [9] |
| Holdings [Text Block] | | |
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
|
[1]
1 The
expense table reflects the expenses of both the feeder Fund and the master Fund.
* Reflects
holdings of The U.S. Government
Money Market Portfolio.
1 The
expense table reflects the expenses of both the feeder Fund and the master Fund.
* Reflects
holdings of The U.S. Government
Money Market Portfolio.
1 The
expense table reflects the expenses of both the feeder Fund and the master Fund.
* Reflects
holdings of The U.S. Government
Money Market Portfolio.
1 The
expense table reflects the expenses of both the feeder Fund and the master Fund.
* Reflects
fee waivers and/or expense reimbursements, without which expenses would have been higher.
* Reflects
holdings of The U.S. Government
Money Market Portfolio. |
