Shareholder Report, Average Annual Return (Details) 74200009900_Franklin Small-Mid Cap Growth Fund_Class A_TSR Annual {Class A}	12 Months Ended	60 Months Ended	120 Months Ended
	Apr. 30, 2026	Apr. 30, 2026	Apr. 30, 2026
Class A
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class A (with sales charge)
Average Annual Return, Percent	8.08%	(0.63%)	9.99%
Without Sales Load [Member] \| Class A
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class A
Average Annual Return, Percent	14.38%	0.50%	10.62%
Russell 3000 Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Russell 3000 Index
Average Annual Return, Percent	31.01%	11.91%	14.76%
Russell Midcap Growth Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Russell Midcap Growth Index
Average Annual Return, Percent	12.86%	5.54%	12.40%
S&P 500 Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	S&P 500 Index
Average Annual Return, Percent	31.05%	13.14%	15.26%