Shareholder Report, Average Annual Return (Details) 74200174500_Franklin Retirement Advantage Plus 2045 Fund_Class A_TSR Annual {Class A}	12 Months Ended	60 Months Ended	120 Months Ended
	Jul. 31, 2026	Jul. 31, 2026	Jul. 31, 2026
Class A
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class A (with sales charge)
Average Annual Return, Percent	5.17%	6.10%	8.32%
Without Sales Load [Member] \| Class A
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class A
Average Annual Return, Percent	11.58%	7.36%	8.96%
Russell 3000 Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Russell 3000 Index
Average Annual Return, Percent	19.60%	11.82%	14.56%
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	2.71%	(0.40%)	1.35%
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	18.95%	9.08%	10.43%