Shareholder Report, Line Graph (Details) 74200181100_Franklin Retirement Advantage 2040 Fund_Class C_TSR Annual {Class C} - 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 C | ||||||||
| Account Value [Line Items] | ||||||||
| Line Graph and Table Measure Name | Class C (with sales charge) | |||||||
| Accumulated Value | $ 16,538 | $ 14,904 | $ 12,103 | $ 10,991 | $ 12,949 | $ 10,477 | $ 10,000 | $ 18,890 |
| Russell 3000 Index [Member] | ||||||||
| Account Value [Line Items] | ||||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||||
| Accumulated Value | 21,164 | 18,270 | 14,484 | 12,621 | 14,554 | 10,939 | 10,000 | $ 25,419 |
| 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 |
| S&P Target Date To 2040 Index [Member] | ||||||||
| Account Value [Line Items] | ||||||||
| Line Graph and Table Measure Name | S&P Target Date To 2040 Index | |||||||
| Accumulated Value | $ 16,230 | $ 14,588 | $ 12,309 | $ 11,053 | $ 12,740 | $ 10,230 | $ 10,000 | $ 18,920 |