v3.26.3
Shareholder Report, Average Annual Return (Details) 74200175800_Franklin Retirement Advantage Plus 2065 Fund_Class R6_TSR Annual {Class R6}
12 Months Ended 60 Months Ended 67 Months Ended
Jul. 31, 2026
Jul. 31, 2026
Jul. 31, 2026
Class R6      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Class R6    
Average Annual Return, Percent 13.89% 9.08% 10.59%
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% 13.69%
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%) (0.45%)
S&P Target Date To 2065+ Index [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name S&P Target Date To 2065+ Index    
Average Annual Return, Percent 20.66% 10.12% 11.40%