Shareholder Report, Average Annual Return (Details)	12 Months Ended	60 Months Ended	120 Months Ended
Shareholder Report, Average Annual Return (Details)	Jun. 30, 2026	Jun. 30, 2026	Jun. 30, 2026
C000006076 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Investor C Shares (with sales charge)
Average Annual Return, Percent	23.00%	10.68%	10.55%
C000006074 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Investor A Shares (with sales charge)
Average Annual Return, Percent	18.45%	10.39%	10.67%
C000006077 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Institutional Shares
Average Annual Return, Percent	25.30%	11.87%	11.57%
C000007847 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class R Shares
Average Annual Return, Percent	24.54%	11.17%	10.88%
C000152172 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class K Shares
Average Annual Return, Percent	25.46%	11.97%	11.68%
Without Sales Load [Member] \| C000006076 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Investor C Shares
Average Annual Return, Percent	24.00%	10.68%	10.55%
Without Sales Load [Member] \| C000006074 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Investor A Shares
Average Annual Return, Percent	25.01%	11.58%	11.27%
Russell 1000 Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Russell 1000 Index
Average Annual Return, Percent	22.01%	12.66%	15.29%
Russell 1000 Value Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Russell 1000 Value Index
Average Annual Return, Percent	27.09%	11.17%	11.52%