Shareholder Report, Average Annual Return (Details)	12 Months Ended	60 Months Ended	120 Months Ended
Shareholder Report, Average Annual Return (Details)	May 31, 2026	May 31, 2026	May 31, 2026
C000213874 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class K Shares
Average Annual Return, Percent	29.06%	12.62%	17.55%
C000006153 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Investor C Shares (with sales charge)
Average Annual Return, Percent	26.77%	11.45%	16.52%
C000006151 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Investor A Shares (with sales charge)
Average Annual Return, Percent	22.00%	11.11%	16.58%
C000006154 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Institutional Shares
Average Annual Return, Percent	29.03%	12.56%	17.50%
Without Sales Load [Member] \| C000006153 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Investor C Shares
Average Annual Return, Percent	27.76%	11.45%	16.52%
Without Sales Load [Member] \| C000006151 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Investor A Shares
Average Annual Return, Percent	28.76%	12.31%	17.21%
Russell 1000 Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Russell 1000 Index
Average Annual Return, Percent	28.85%	13.33%	15.38%
Russell 1000 Growth Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Russell 1000 Growth Index
Average Annual Return, Percent	28.66%	15.73%	18.86%