Shareholder Report, Line Graph (Details) 74200181400_Franklin Retirement Advantage 2055 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	$ 18,016	$ 15,780	$ 12,393	$ 10,845	$ 12,865	$ 9,999	$ 9,425	$ 21,471
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 2055 Index [Member]
Account Value [Line Items]
Line Graph and Table Measure Name								S&P Target Date To 2055 Index
Accumulated Value	$ 17,279	$ 15,293	$ 12,663	$ 11,180	$ 12,997	$ 10,157	$ 10,000	$ 20,705