Shareholder Report, Average Annual Return (Details) 74300185600_Franklin Multi-Asset Income Fund_Class C_TSR Annual {Class C}

12 Months Ended

60 Months Ended

80 Months Ended

Aug. 31, 2026

Aug. 31, 2026

Aug. 31, 2026

Class C

Average Annual Return [Line Items]

Line Graph and Table Measure Name

Class C (with sales charge)

Average Annual Return, Percent

7.63%

3.18%

3.98%

Without Sales Load [Member] | Class C

Average Annual Return [Line Items]

Line Graph and Table Measure Name

Class C

Average Annual Return, Percent

8.63%

3.18%

3.98%

Bloomberg U.S. Aggregate Index [Member]

Average Annual Return [Line Items]

Line Graph and Table Measure Name

Bloomberg U.S. Aggregate Index

Average Annual Return, Percent

1.89%

(0.29%)

0.77%

Franklin Multi-Asset Income Blended Benchmark [Member]

Average Annual Return [Line Items]

Line Graph and Table Measure Name

^[1]

Franklin Multi-Asset Income Blended Benchmark†

Average Annual Return, Percent

^[1]

7.55%

4.01%

5.24%

[1]

†	The Franklin Multi-Asset Income Blended Benchmark is comprised of 43.5% Bloomberg U.S. Aggregate Index, 21.5% Russell 3000 Index, 18.5% Bloomberg U.S. Corporate High Yield Index, 11% Bloomberg Global Aggregate ex-USD Index Hedged USD, and 5.5% MSCI ACWI ex USA Index-NR.