Prospectus 2 [Member] Performance Management - Prospectus 2 - Putnam Mortgage Opportunities Fund |
May 31, 2025 |
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| Prospectus [Line Items] | |||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | ||||||||||||||||||||
| Performance Narrative [Text Block] | The accompanying bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Class A shares. The table shows the average annual total returns of Class I shares and also compares the fund’s performance with the average annual total returns of a broad measure of market performance and an additional index with characteristics relevant to the fund. Performance for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The fund makes updated performance information, including its current net asset value, available at www.franklintempleton.com. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
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| Performance Past Does Not Indicate Future [Text] | The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. | ||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart shows changes in the fund’s performance from year to year for Class A shares. The table shows the average annual total returns of Class I shares and also compares the fund’s performance with the average annual total returns of a broad measure of market performance and an additional index with characteristics relevant to the fund. | ||||||||||||||||||||
| Bar Chart [Heading] | Annual total returns for class I shares before sales charges | ||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Performance Table Heading | Average annual total returns after sales charges For periods ended 12/31/24 | ||||||||||||||||||||
| Performance Table Narrative | After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. Important data provider notices and terms are available at www.franklintempletondatasources.com. Such information is subject to change.
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| Performance Table Uses Highest Federal Rate | After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. | ||||||||||||||||||||
| Performance Availability Website Address [Text] | www.franklintempleton.com | ||||||||||||||||||||
| Class I | |||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||
| Year to Date Return, Label [Optional Text] | year-to-date return | ||||||||||||||||||||
| Bar Chart, Year to Date Return | 3.84% | ||||||||||||||||||||
| Bar Chart, Year to Date Return, Date | Jun. 30, 2025 | ||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Best Quarter: | ||||||||||||||||||||
| Highest Quarterly Return | 4.28% | ||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | ||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Worst Quarter: | ||||||||||||||||||||
| Lowest Quarterly Return | (13.14%) | ||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | ||||||||||||||||||||