Shareholder Report, Average Annual Return (Details) 74200181100_Franklin Retirement Advantage 2040 Fund_Class A_TSR Annual {Class A}	12 Months Ended	60 Months Ended	80 Months Ended
	Aug. 31, 2026	Aug. 31, 2026	Aug. 31, 2026
Class A
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class A (with sales charge)
Average Annual Return, Percent	8.52%	7.40%	9.87%
Without Sales Load [Member] \| Class A
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class A
Average Annual Return, Percent	15.14%	8.68%	10.85%
Russell 3000 Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Russell 3000 Index
Average Annual Return, Percent	20.10%	11.80%	15.02%
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%
S&P Target Date To 2040 Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	S&P Target Date To 2040 Index
Average Annual Return, Percent	16.58%	8.23%	10.04%