Shareholder Report, Line Graph (Details) 74300185600_Franklin Multi-Asset Income Fund_Class A_TSR Annual {Class A} - 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 A | ||||||||
| Account Value [Line Items] | ||||||||
| Line Graph and Table Measure Name | Class A (with sales charge) | |||||||
| Accumulated Value | $ 11,970 | $ 11,218 | $ 9,722 | $ 9,419 | $ 10,783 | $ 9,980 | $ 9,600 | $ 13,101 |
| 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 | Franklin Multi-Asset Income Blended Benchmark | |||||||
| Accumulated Value | $ 13,071 | $ 12,171 | $ 10,778 | $ 10,284 | $ 11,549 | $ 10,603 | $ 10,000 | $ 14,058 |