Shareholder Report, Line Graph (Details) 74300185600_Franklin Multi-Asset Income Fund_Class R_TSR Annual {Class R} - USD ($) |
12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Aug. 31, 2025 |
Aug. 31, 2024 |
Aug. 31, 2023 |
Aug. 31, 2022 |
Aug. 31, 2021 |
Aug. 31, 2020 |
Dec. 31, 2019 |
Aug. 31, 2026 |
|||||
| Class R | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Class R | |||||||||||
| Accumulated Value | $ 12,293 | $ 11,549 | $ 10,034 | $ 9,745 | $ 11,184 | $ 10,374 | $ 10,000 | $ 13,421 | ||||
| Bloomberg U.S. Aggregate Index [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. Aggregate Index | |||||||||||
| Accumulated Value | 10,329 | 10,015 | 9,334 | 9,447 | 10,676 | 10,685 | 10,000 | $ 10,524 | ||||
| Franklin Multi-Asset Income Blended Benchmark [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | [1] | Franklin Multi-Asset Income Blended Benchmark† | ||||||||||
| Accumulated Value | $ 13,071 | $ 12,171 | $ 10,778 | $ 10,284 | $ 11,549 | $ 10,603 | $ 10,000 | $ 14,058 | ||||
| ||||||||||||