| Shareholder Report | 12 Months Ended |
| Jul. 31, 2024 USD ($) $ / shares |
| Shareholder Report [Line Items] | | |
| Document Type | N-CSR | |
| Amendment Flag | false | |
| Registrant Name | Franklin
Floating Rate Master Trust | |
| Entity Central Index Key | 0001109441 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | Jul. 31, 2024 | |
| Class A | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Franklin
Floating Rate Master Series | |
| Class Name | Class
A | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This
annual
shareholder report
contains important information about Franklin
Floating Rate Master Series for the period August
1, 2023, to July 31, 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-internalusefunds-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-internalusefunds-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
$56
0.53% | [1] |
| Expenses Paid, Amount | $ 56 | |
| Expense Ratio, Percent | 0.53% | |
| Factors Affecting Performance [Text Block] | HOW
DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? For the twelve months ended July
31, 2024, Class A shares of
Franklin Floating Rate Master
Series returned 10.10%.
The Fund compares its performance
to the Morningstar LSTA US Leveraged Loan Index, which returned 10.45% for the same period. The Fund previously
compared its performance to the Credit Suisse Leveraged Loan Index, which returned 10.42% for the same period. Effective March
1, 2024, the Morningstar LSTA US Leveraged Loan Index replaced the Credit Suisse Leveraged Loan Index as the Fund’s benchmark.
The Fund’s investment manager believes the Morningstar LSTA US Leveraged Loan Index is an appropriate benchmark for the
Fund. PERFORMANCE
HIGHLIGHTS
Top
contributors to performance:
↑
Prior
to March 1, 2024, allocation to equity received from prior restructurings; loan selection in leisure, automotive transportation and
financial issuers; underweight in upper-tier loans and overweight in middle-tier loans relative to the benchmark
↑
Post
March 1, 2024, underweight in the housing, cable/wireless video and service industries; underweight in lower-tier loans; and loan
selection in telecommunications, aerospace and diversified media issuers
Top
detractors from performance:
↓
Prior
to March 1, 2024, underweight to the housing industry; loan selection in service, retail and telecommunications issuers; and underweight
in lower-tier loans
↓
Post
March 1, 2024, allocation to equity received from prior restructurings; loan selection in service, health care and manufacturing
issuers; overweight to land transportation industry; and underweight to telecommunications and energy relative to the
benchmark | |
| 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. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE
ANNUAL TOTAL RETURNS (%) Period
Ended July 31, 2024
1
Year
5
Year
10
Year
Class
A
10.10
4.03
3.48
Bloomberg
U.S. Aggregate Index
5.10
0.19
1.60
Morningstar
LSTA US Leveraged Loan Index 1
10.45
5.50
4.67
Credit
Suisse Leveraged Loan Index
10.42
5.35
4.69 | [2] |
| No Deduction of Taxes [Text Block] | The
graph and table do not reflect
the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. | |
| Updated Performance Information Location [Text Block] | For current month-end performance,
please call Franklin Templeton at (800)
DIAL BEN/342-5236. Important data provider notices
and terms available at www.franklintempletondatasources.com. | |
| Net Assets | $ 514,935,612 | |
| Holdings Count | $ / shares | 318 | [3] |
| Advisory Fees Paid, Amount | $ 2,171,569 | |
| Investment Company Portfolio Turnover | 49.16% | |
| Additional Fund Statistics [Text Block] | KEY
FUND STATISTICS (as
of July 31, 2024)
Total
Net Assets
$514,935,612
Total
Number of Portfolio Holdings *
318
Total
Management Fee Paid
$2,171,569
Portfolio
Turnover Rate
49.16% | [3] |
| Holdings [Text Block] | | |
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-internalusefunds-documents | |
|
[1]
* Reflects
fee waivers and/or expense reimbursements, without which expenses would have been higher.
1 Effective
March 1, 2024, the Morningstar LSTA US Leveraged Loan Index replaced the Credit Suisse Leveraged Loan Index as the Fund’s benchmark.
The Fund’s investment manager believes the Morningstar LSTA US Leveraged Loan Index is an appropriate benchmark for the Fund.
* Does
not include derivatives, except purchased options, if any. |
