v3.26.3
Shareholder Report, Average Annual Return (Details) 74200174600_Franklin Retirement Advantage Plus Maturity Fund_Class R5_TSR Annual {Class R5}
12 Months Ended 60 Months Ended 120 Months Ended
Jul. 31, 2026
Jul. 31, 2026
Jul. 31, 2026
Class R5      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Class R5    
Average Annual Return, Percent 6.19% 4.44% 3.73%
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%
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%
S&P Target Date To Retirement Income Index [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name S&P Target Date To Retirement Income Index    
Average Annual Return, Percent 8.69% 3.92% 4.98%