v3.26.3
Shareholder Report, Line Graph (Details) - USD ($)
 12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
Aug. 31, 2016
Aug. 31, 2026
Aug. 31, 2017
Aug. 31, 2018
Aug. 31, 2019
Aug. 31, 2020
Aug. 31, 2021
Aug. 31, 2022
Aug. 31, 2023
Aug. 31, 2024
Aug. 31, 2025
Aug. 31, 2026
C000002190 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   A with initial sales charge (5.75%)                    
Accumulated Value $ 9,425   $ 11,132 $ 13,346 $ 14,006 $ 16,890 $ 22,053 $ 19,216 $ 21,708 $ 26,901 $ 30,310 $ 34,835
C000002192 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   B with CDSC (declining over six years from 4% to 0%)                    
Accumulated Value 10,000   11,721 13,949 14,529 17,390 22,533 19,487 21,853 26,878 30,054 34,292
C000002193 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   C with CDSC (1% for 12 months)                    
Accumulated Value 10,000   11,722 13,948 14,525 17,381 22,530 19,479 21,850 26,867 30,050 34,276
C000002216 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   C with CDSC (1% for 12 months)                    
Accumulated Value 10,000   11,494 15,399 15,819 20,019 27,669 18,058 19,019 20,891 22,027 26,644
C000002215 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   B with CDSC (declining over six years from 4% to 0%)                    
Accumulated Value 10,000   11,497 15,406 15,821 20,026 27,675 18,069 19,021 20,889 22,031 26,644
C000002210 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   A with initial sales charge (5.75%)                    
Accumulated Value 9,425   10,917 14,737 15,251 19,447 27,076 17,816 18,894 20,911 22,211 27,070
C000002223 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   A with initial sales charge (5.75%)                    
Accumulated Value 9,425   10,995 11,741 11,527 13,163 16,359 12,868 14,632 17,023 18,053 21,810
C000002228 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   B with CDSC (declining over six years from 4% to 0%)                    
Accumulated Value 10,000   11,577 12,273 11,951 13,549 16,713 13,045 14,723 16,998 17,895 21,467
C000002229 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   C with CDSC (1% for 12 months)                    
Accumulated Value 10,000   11,574 12,265 11,951 13,547 16,710 13,042 14,716 16,995 17,889 21,457
C000002252 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   C with CDSC (1% for 12 months)                    
Accumulated Value 10,000   12,762 16,821 17,188 25,285 30,862 21,380 26,207 35,961 41,901 53,626
C000002251 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   B with CDSC (declining over six years from 4% to 0%)                    
Accumulated Value 10,000   12,760 16,819 17,190 25,282 30,860 21,377 26,207 35,964 41,895 53,622
C000002249 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   A with initial sales charge (5.75%)                    
Accumulated Value 9,425   12,119 16,092 16,570 24,561 30,203 21,082 26,033 36,001 42,252 54,490
C000002259 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   A with initial sales charge (5.75%)                    
Accumulated Value 9,425   10,579 11,576 12,137 12,493 16,597 15,503 16,573 20,210 21,455 24,358
C000002264 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   B with CDSC (declining over six years from 4% to 0%)                    
Accumulated Value 10,000   11,140 12,101 12,594 12,865 16,965 15,729 16,684 20,195 21,281 23,978
C000002265 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   C with CDSC (1% for 12 months)                    
Accumulated Value 10,000   11,143 12,099 12,595 12,865 16,964 15,727 16,687 20,195 21,281 23,982
C000132015 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   C with CDSC (1% for 12 months)                    
Accumulated Value 10,000   11,036 12,290 13,813 14,745 19,198 17,251 18,497 22,610 23,492 25,905
C000132014 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   B with CDSC (declining over six years from 4% to 0%)                    
Accumulated Value 10,000   11,036 12,285 13,810 14,744 19,195 17,247 18,494 22,598 23,485 25,897
C000132013 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   A with initial sales charge (5.75%)                    
Accumulated Value 9,425   10,479 11,751 13,305 14,322 18,784 17,005 18,368 22,622 23,684 26,301
C000132022 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   A with initial sales charge (5.75%)                    
Accumulated Value 9,425   10,300 11,245 11,962 12,512 15,243 13,818 15,292 18,908 20,469 22,922
C000132023 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   B with CDSC (declining over six years from 4% to 0%)                    
Accumulated Value 10,000   10,848 11,742 12,399 12,872 15,559 13,999 15,385 18,881 20,281 22,555
C000132024 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   C with CDSC (1% for 12 months)                    
Accumulated Value 10,000   10,849 11,748 12,403 12,870 15,573 14,009 15,394 18,894 20,298 22,560
Russell 3000 Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 3000® Index                    
Accumulated Value 10,000   11,606 13,956 14,139 17,171 22,845 19,810 22,734 28,677 33,220 39,898
MSCI EAFE Europe Australasia Far East Index net div [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   MSCI EAFE (Europe, Australasia, Far East) Index (net div)                    
Accumulated Value 10,000   11,764 12,280 11,880 12,609 15,903 12,754 15,039 17,957 20,448 24,869
Standard And Poor s 500 Stock Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Standard & Poor's 500 Stock Index                    
Accumulated Value 10,000   11,623 13,909 14,315 17,455 22,895 20,325 23,566 29,960 34,718 41,793
MSCI All Country World Index net div [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   MSCI All Country World Index (net div)                    
Accumulated Value 10,000   11,711 13,048 13,011 15,161 19,504 16,406 18,694 23,076 26,721 32,693
Russell 2000 Growth Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 2000® Growth Index                    
Accumulated Value 10,000   11,639 15,213 13,537 15,876 21,529 16,091 17,181 20,218 22,336 27,528
Standard And Poor s North American Technology Sector Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Standard & Poor's North American Technology Sector Index                    
Accumulated Value 10,000   12,927 17,854 18,617 28,269 37,409 27,672 36,144 49,691 62,225 87,758
Russell 1000 Value Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 1000® Value Index                    
Accumulated Value $ 10,000   $ 11,158 $ 12,549 $ 12,626 $ 12,733 $ 17,373 $ 16,291 $ 17,692 $ 21,433 $ 23,432 $ 30,397