Shareholder Report, Line Graph (Details) 74200181200_Franklin Retirement Advantage 2045 Fund_Class R4_TSR Annual {Class R4} - 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 R4 | ||||||||
| Account Value [Line Items] | ||||||||
| Line Graph and Table Measure Name | Class R4 | |||||||
| Accumulated Value | $ 17,985 | $ 15,918 | $ 12,664 | $ 11,302 | $ 13,284 | $ 10,529 | $ 10,000 | $ 21,142 |
| 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 2045 Index [Member] | ||||||||
| Account Value [Line Items] | ||||||||
| Line Graph and Table Measure Name | S&P Target Date To 2045 Index | |||||||
| Accumulated Value | $ 16,807 | $ 14,984 | $ 12,509 | $ 11,104 | $ 12,872 | $ 10,177 | $ 10,000 | $ 19,905 |