Shareholder Report, Average Annual Return (Details) 74200181200_Franklin Retirement Advantage 2045 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	15.54%	8.80%	10.95%
Without Sales Load [Member] \| Class C
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class C
Average Annual Return, Percent	16.54%	8.80%	10.95%
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 2045 Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	S&P Target Date To 2045 Index
Average Annual Return, Percent	18.43%	9.11%	10.88%