Shareholder Report, Holdings (Details)
|
Mar. 31, 2025 |
| C000006520 [Member] | Dollarama Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006520 [Member] | OBIC Co Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.30%
|
| C000006520 [Member] | Symrise AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006520 [Member] | Agnico Eagle Mines Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006520 [Member] | NS Solutions Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000006520 [Member] | Breedon Group PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006520 [Member] | Cellnex Telecom S A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006520 [Member] | GEA Group AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006520 [Member] | Cranswick PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006520 [Member] | Sodexo [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000006520 [Member] | Other Countries [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.60%
|
| C000006520 [Member] | AUSTRALIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.80%
|
| C000006520 [Member] | CANADA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006520 [Member] | CHINA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006520 [Member] | GERMANY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.90%
|
| C000006520 [Member] | FRANCE |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.20%
|
| C000006520 [Member] | UNITED KINGDOM |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.00%
|
| C000006520 [Member] | INDIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000006520 [Member] | JAPAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.60%
|
| C000006520 [Member] | TAIWAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006520 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
97.60%
|
| C000006520 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006525 [Member] | Dollarama Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006525 [Member] | OBIC Co Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.30%
|
| C000006525 [Member] | Symrise AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006525 [Member] | Agnico Eagle Mines Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006525 [Member] | NS Solutions Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000006525 [Member] | Breedon Group PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006525 [Member] | Cellnex Telecom S A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006525 [Member] | GEA Group AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006525 [Member] | Cranswick PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006525 [Member] | Sodexo [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000006525 [Member] | Other Countries [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.60%
|
| C000006525 [Member] | AUSTRALIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.80%
|
| C000006525 [Member] | CANADA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006525 [Member] | CHINA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006525 [Member] | GERMANY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.90%
|
| C000006525 [Member] | FRANCE |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.20%
|
| C000006525 [Member] | UNITED KINGDOM |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.00%
|
| C000006525 [Member] | INDIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000006525 [Member] | JAPAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.60%
|
| C000006525 [Member] | TAIWAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006525 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
97.60%
|
| C000006525 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006526 [Member] | Dollarama Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006526 [Member] | OBIC Co Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.30%
|
| C000006526 [Member] | Symrise AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006526 [Member] | Agnico Eagle Mines Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006526 [Member] | NS Solutions Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000006526 [Member] | Breedon Group PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006526 [Member] | Cellnex Telecom S A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006526 [Member] | GEA Group AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006526 [Member] | Cranswick PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006526 [Member] | Sodexo [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000006526 [Member] | Other Countries [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.60%
|
| C000006526 [Member] | AUSTRALIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.80%
|
| C000006526 [Member] | CANADA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006526 [Member] | CHINA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006526 [Member] | GERMANY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.90%
|
| C000006526 [Member] | FRANCE |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.20%
|
| C000006526 [Member] | UNITED KINGDOM |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.00%
|
| C000006526 [Member] | INDIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000006526 [Member] | JAPAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.60%
|
| C000006526 [Member] | TAIWAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006526 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
97.60%
|
| C000006526 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006527 [Member] | Dollarama Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006527 [Member] | OBIC Co Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.30%
|
| C000006527 [Member] | Symrise AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006527 [Member] | Agnico Eagle Mines Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006527 [Member] | NS Solutions Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000006527 [Member] | Breedon Group PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006527 [Member] | Cellnex Telecom S A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006527 [Member] | GEA Group AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006527 [Member] | Cranswick PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006527 [Member] | Sodexo [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000006527 [Member] | Other Countries [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.60%
|
| C000006527 [Member] | AUSTRALIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.80%
|
| C000006527 [Member] | CANADA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006527 [Member] | CHINA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006527 [Member] | GERMANY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.90%
|
| C000006527 [Member] | FRANCE |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.20%
|
| C000006527 [Member] | UNITED KINGDOM |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.00%
|
| C000006527 [Member] | INDIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000006527 [Member] | JAPAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.60%
|
| C000006527 [Member] | TAIWAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006527 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
97.60%
|
| C000006527 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006529 [Member] | Dollarama Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006529 [Member] | OBIC Co Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.30%
|
| C000006529 [Member] | Symrise AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006529 [Member] | Agnico Eagle Mines Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006529 [Member] | NS Solutions Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000006529 [Member] | Breedon Group PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006529 [Member] | Cellnex Telecom S A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006529 [Member] | GEA Group AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006529 [Member] | Cranswick PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006529 [Member] | Sodexo [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000006529 [Member] | Other Countries [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.60%
|
| C000006529 [Member] | AUSTRALIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.80%
|
| C000006529 [Member] | CANADA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006529 [Member] | CHINA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006529 [Member] | GERMANY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.90%
|
| C000006529 [Member] | FRANCE |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.20%
|
| C000006529 [Member] | UNITED KINGDOM |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.00%
|
| C000006529 [Member] | INDIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000006529 [Member] | JAPAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.60%
|
| C000006529 [Member] | TAIWAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006529 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
97.60%
|
| C000006529 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006531 [Member] | Dollarama Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006531 [Member] | OBIC Co Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.30%
|
| C000006531 [Member] | Symrise AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006531 [Member] | Agnico Eagle Mines Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006531 [Member] | NS Solutions Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000006531 [Member] | Breedon Group PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006531 [Member] | Cellnex Telecom S A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006531 [Member] | GEA Group AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006531 [Member] | Cranswick PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006531 [Member] | Sodexo [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000006531 [Member] | Other Countries [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.60%
|
| C000006531 [Member] | AUSTRALIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.80%
|
| C000006531 [Member] | CANADA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006531 [Member] | CHINA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006531 [Member] | GERMANY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.90%
|
| C000006531 [Member] | FRANCE |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.20%
|
| C000006531 [Member] | UNITED KINGDOM |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.00%
|
| C000006531 [Member] | INDIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000006531 [Member] | JAPAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.60%
|
| C000006531 [Member] | TAIWAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006531 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
97.60%
|
| C000006531 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006532 [Member] | Dollarama Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006532 [Member] | OBIC Co Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.30%
|
| C000006532 [Member] | Symrise AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006532 [Member] | Agnico Eagle Mines Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006532 [Member] | NS Solutions Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000006532 [Member] | Breedon Group PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006532 [Member] | Cellnex Telecom S A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006532 [Member] | GEA Group AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006532 [Member] | Cranswick PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006532 [Member] | Sodexo [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000006532 [Member] | Other Countries [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.60%
|
| C000006532 [Member] | AUSTRALIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.80%
|
| C000006532 [Member] | CANADA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006532 [Member] | CHINA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006532 [Member] | GERMANY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.90%
|
| C000006532 [Member] | FRANCE |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.20%
|
| C000006532 [Member] | UNITED KINGDOM |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.00%
|
| C000006532 [Member] | INDIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000006532 [Member] | JAPAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.60%
|
| C000006532 [Member] | TAIWAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006532 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
97.60%
|
| C000006532 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006521 [Member] | Dollarama Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006521 [Member] | OBIC Co Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.30%
|
| C000006521 [Member] | Symrise AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006521 [Member] | Agnico Eagle Mines Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000006521 [Member] | NS Solutions Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000006521 [Member] | Breedon Group PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006521 [Member] | Cellnex Telecom S A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006521 [Member] | GEA Group AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006521 [Member] | Cranswick PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000006521 [Member] | Sodexo [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000006521 [Member] | Other Countries [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.60%
|
| C000006521 [Member] | AUSTRALIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.80%
|
| C000006521 [Member] | CANADA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006521 [Member] | CHINA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000006521 [Member] | GERMANY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.90%
|
| C000006521 [Member] | FRANCE |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.20%
|
| C000006521 [Member] | UNITED KINGDOM |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.00%
|
| C000006521 [Member] | INDIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000006521 [Member] | JAPAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.60%
|
| C000006521 [Member] | TAIWAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006521 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
97.60%
|
| C000006521 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000116933 [Member] | Dollarama Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000116933 [Member] | OBIC Co Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.30%
|
| C000116933 [Member] | Symrise AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000116933 [Member] | Agnico Eagle Mines Ltd [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000116933 [Member] | NS Solutions Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000116933 [Member] | Breedon Group PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000116933 [Member] | Cellnex Telecom S A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000116933 [Member] | GEA Group AG [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000116933 [Member] | Cranswick PLC [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000116933 [Member] | Sodexo [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000116933 [Member] | Other Countries [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.60%
|
| C000116933 [Member] | AUSTRALIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.80%
|
| C000116933 [Member] | CANADA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000116933 [Member] | CHINA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000116933 [Member] | GERMANY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.90%
|
| C000116933 [Member] | FRANCE |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.20%
|
| C000116933 [Member] | UNITED KINGDOM |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.00%
|
| C000116933 [Member] | INDIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000116933 [Member] | JAPAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.60%
|
| C000116933 [Member] | TAIWAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000116933 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
97.60%
|
| C000116933 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006533 [Member] | Microsoft Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.40%
|
| C000006533 [Member] | Amazon com Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000006533 [Member] | NVIDIA Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006533 [Member] | Meta Platforms Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006533 [Member] | Apple Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000006533 [Member] | Visa Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.50%
|
| C000006533 [Member] | Alphabet Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000006533 [Member] | JPMorgan Chase And Co [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.50%
|
| C000006533 [Member] | Salesforce Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006533 [Member] | Johnson And Johnson [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006533 [Member] | Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.30%
|
| C000006533 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.50%
|
| C000006533 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006533 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.90%
|
| C000006533 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.40%
|
| C000006533 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
14.50%
|
| C000006533 [Member] | Capital Goods [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.60%
|
| C000006533 [Member] | Consumer Cyclicals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006533 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
99.60%
|
| C000006533 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.40%
|
| C000006538 [Member] | Microsoft Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.40%
|
| C000006538 [Member] | Amazon com Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000006538 [Member] | NVIDIA Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006538 [Member] | Meta Platforms Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006538 [Member] | Apple Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000006538 [Member] | Visa Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.50%
|
| C000006538 [Member] | Alphabet Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000006538 [Member] | JPMorgan Chase And Co [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.50%
|
| C000006538 [Member] | Salesforce Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006538 [Member] | Johnson And Johnson [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006538 [Member] | Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.30%
|
| C000006538 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.50%
|
| C000006538 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006538 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.90%
|
| C000006538 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.40%
|
| C000006538 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
14.50%
|
| C000006538 [Member] | Capital Goods [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.60%
|
| C000006538 [Member] | Consumer Cyclicals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006538 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
99.60%
|
| C000006538 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.40%
|
| C000006539 [Member] | Microsoft Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.40%
|
| C000006539 [Member] | Amazon com Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000006539 [Member] | NVIDIA Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006539 [Member] | Meta Platforms Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006539 [Member] | Apple Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000006539 [Member] | Visa Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.50%
|
| C000006539 [Member] | Alphabet Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000006539 [Member] | JPMorgan Chase And Co [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.50%
|
| C000006539 [Member] | Salesforce Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006539 [Member] | Johnson And Johnson [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006539 [Member] | Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.30%
|
| C000006539 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.50%
|
| C000006539 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006539 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.90%
|
| C000006539 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.40%
|
| C000006539 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
14.50%
|
| C000006539 [Member] | Capital Goods [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.60%
|
| C000006539 [Member] | Consumer Cyclicals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006539 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
99.60%
|
| C000006539 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.40%
|
| C000006540 [Member] | Microsoft Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.40%
|
| C000006540 [Member] | Amazon com Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000006540 [Member] | NVIDIA Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006540 [Member] | Meta Platforms Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006540 [Member] | Apple Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000006540 [Member] | Visa Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.50%
|
| C000006540 [Member] | Alphabet Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000006540 [Member] | JPMorgan Chase And Co [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.50%
|
| C000006540 [Member] | Salesforce Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006540 [Member] | Johnson And Johnson [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006540 [Member] | Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.30%
|
| C000006540 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.50%
|
| C000006540 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006540 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.90%
|
| C000006540 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.40%
|
| C000006540 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
14.50%
|
| C000006540 [Member] | Capital Goods [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.60%
|
| C000006540 [Member] | Consumer Cyclicals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006540 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
99.60%
|
| C000006540 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.40%
|
| C000006542 [Member] | Microsoft Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.40%
|
| C000006542 [Member] | Amazon com Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000006542 [Member] | NVIDIA Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006542 [Member] | Meta Platforms Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006542 [Member] | Apple Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000006542 [Member] | Visa Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.50%
|
| C000006542 [Member] | Alphabet Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000006542 [Member] | JPMorgan Chase And Co [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.50%
|
| C000006542 [Member] | Salesforce Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006542 [Member] | Johnson And Johnson [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006542 [Member] | Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.30%
|
| C000006542 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.50%
|
| C000006542 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006542 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.90%
|
| C000006542 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.40%
|
| C000006542 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
14.50%
|
| C000006542 [Member] | Capital Goods [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.60%
|
| C000006542 [Member] | Consumer Cyclicals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006542 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
99.60%
|
| C000006542 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.40%
|
| C000006544 [Member] | Microsoft Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.40%
|
| C000006544 [Member] | Amazon com Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000006544 [Member] | NVIDIA Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006544 [Member] | Meta Platforms Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006544 [Member] | Apple Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000006544 [Member] | Visa Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.50%
|
| C000006544 [Member] | Alphabet Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000006544 [Member] | JPMorgan Chase And Co [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.50%
|
| C000006544 [Member] | Salesforce Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006544 [Member] | Johnson And Johnson [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006544 [Member] | Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.30%
|
| C000006544 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.50%
|
| C000006544 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006544 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.90%
|
| C000006544 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.40%
|
| C000006544 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
14.50%
|
| C000006544 [Member] | Capital Goods [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.60%
|
| C000006544 [Member] | Consumer Cyclicals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006544 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
99.60%
|
| C000006544 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.40%
|
| C000006545 [Member] | Microsoft Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.40%
|
| C000006545 [Member] | Amazon com Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000006545 [Member] | NVIDIA Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006545 [Member] | Meta Platforms Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006545 [Member] | Apple Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000006545 [Member] | Visa Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.50%
|
| C000006545 [Member] | Alphabet Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000006545 [Member] | JPMorgan Chase And Co [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.50%
|
| C000006545 [Member] | Salesforce Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006545 [Member] | Johnson And Johnson [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006545 [Member] | Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.30%
|
| C000006545 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.50%
|
| C000006545 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006545 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.90%
|
| C000006545 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.40%
|
| C000006545 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
14.50%
|
| C000006545 [Member] | Capital Goods [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.60%
|
| C000006545 [Member] | Consumer Cyclicals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006545 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
99.60%
|
| C000006545 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.40%
|
| C000006534 [Member] | Microsoft Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.40%
|
| C000006534 [Member] | Amazon com Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000006534 [Member] | NVIDIA Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006534 [Member] | Meta Platforms Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006534 [Member] | Apple Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000006534 [Member] | Visa Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.50%
|
| C000006534 [Member] | Alphabet Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000006534 [Member] | JPMorgan Chase And Co [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.50%
|
| C000006534 [Member] | Salesforce Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006534 [Member] | Johnson And Johnson [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000006534 [Member] | Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.30%
|
| C000006534 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.50%
|
| C000006534 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000006534 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.90%
|
| C000006534 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.40%
|
| C000006534 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
14.50%
|
| C000006534 [Member] | Capital Goods [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.60%
|
| C000006534 [Member] | Consumer Cyclicals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006534 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
99.60%
|
| C000006534 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.40%
|
| C000034431 [Member] | Microsoft Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.40%
|
| C000034431 [Member] | Amazon com Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000034431 [Member] | NVIDIA Corp [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000034431 [Member] | Meta Platforms Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000034431 [Member] | Apple Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000034431 [Member] | Visa Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.50%
|
| C000034431 [Member] | Alphabet Inc A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000034431 [Member] | JPMorgan Chase And Co [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.50%
|
| C000034431 [Member] | Salesforce Inc [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000034431 [Member] | Johnson And Johnson [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000034431 [Member] | Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
30.30%
|
| C000034431 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.50%
|
| C000034431 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.00%
|
| C000034431 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.90%
|
| C000034431 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.40%
|
| C000034431 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
14.50%
|
| C000034431 [Member] | Capital Goods [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.60%
|
| C000034431 [Member] | Consumer Cyclicals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000034431 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
99.60%
|
| C000034431 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.40%
|
| C000006546 [Member] | Fitch, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.60%
|
| C000006546 [Member] | Fitch, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.60%
|
| C000006546 [Member] | Fitch, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.70%
|
| C000006546 [Member] | Fitch, CCC Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006546 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006546 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006546 [Member] | Money Market Funds Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006546 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006546 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.10%
|
| C000006546 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.70%
|
| C000006546 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.40%
|
| C000006546 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.00%
|
| C000006546 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.90%
|
| C000006546 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006546 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000006546 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.30%
|
| C000006546 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006546 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006546 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006546 [Member] | Fixed Income Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
38.90%
|
| C000006546 [Member] | US Government Debt Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006546 [Member] | Federal Agencies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.10%
|
| C000006546 [Member] | Non Fixed Income [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006551 [Member] | Fitch, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.60%
|
| C000006551 [Member] | Fitch, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.60%
|
| C000006551 [Member] | Fitch, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.70%
|
| C000006551 [Member] | Fitch, CCC Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006551 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006551 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006551 [Member] | Money Market Funds Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006551 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006551 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.10%
|
| C000006551 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.70%
|
| C000006551 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.40%
|
| C000006551 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.00%
|
| C000006551 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.90%
|
| C000006551 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006551 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000006551 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.30%
|
| C000006551 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006551 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006551 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006551 [Member] | Fixed Income Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
38.90%
|
| C000006551 [Member] | US Government Debt Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006551 [Member] | Federal Agencies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.10%
|
| C000006551 [Member] | Non Fixed Income [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006552 [Member] | Fitch, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.60%
|
| C000006552 [Member] | Fitch, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.60%
|
| C000006552 [Member] | Fitch, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.70%
|
| C000006552 [Member] | Fitch, CCC Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006552 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006552 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006552 [Member] | Money Market Funds Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006552 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006552 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.10%
|
| C000006552 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.70%
|
| C000006552 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.40%
|
| C000006552 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.00%
|
| C000006552 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.90%
|
| C000006552 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006552 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000006552 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.30%
|
| C000006552 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006552 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006552 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006552 [Member] | Fixed Income Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
38.90%
|
| C000006552 [Member] | US Government Debt Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006552 [Member] | Federal Agencies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.10%
|
| C000006552 [Member] | Non Fixed Income [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006553 [Member] | Fitch, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.60%
|
| C000006553 [Member] | Fitch, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.60%
|
| C000006553 [Member] | Fitch, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.70%
|
| C000006553 [Member] | Fitch, CCC Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006553 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006553 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006553 [Member] | Money Market Funds Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006553 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006553 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.10%
|
| C000006553 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.70%
|
| C000006553 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.40%
|
| C000006553 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.00%
|
| C000006553 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.90%
|
| C000006553 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006553 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000006553 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.30%
|
| C000006553 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006553 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006553 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006553 [Member] | Fixed Income Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
38.90%
|
| C000006553 [Member] | US Government Debt Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006553 [Member] | Federal Agencies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.10%
|
| C000006553 [Member] | Non Fixed Income [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006555 [Member] | Fitch, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.60%
|
| C000006555 [Member] | Fitch, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.60%
|
| C000006555 [Member] | Fitch, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.70%
|
| C000006555 [Member] | Fitch, CCC Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006555 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006555 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006555 [Member] | Money Market Funds Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006555 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006555 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.10%
|
| C000006555 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.70%
|
| C000006555 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.40%
|
| C000006555 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.00%
|
| C000006555 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.90%
|
| C000006555 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006555 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000006555 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.30%
|
| C000006555 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006555 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006555 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006555 [Member] | Fixed Income Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
38.90%
|
| C000006555 [Member] | US Government Debt Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006555 [Member] | Federal Agencies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.10%
|
| C000006555 [Member] | Non Fixed Income [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006557 [Member] | Fitch, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.60%
|
| C000006557 [Member] | Fitch, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.60%
|
| C000006557 [Member] | Fitch, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.70%
|
| C000006557 [Member] | Fitch, CCC Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006557 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006557 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006557 [Member] | Money Market Funds Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006557 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006557 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.10%
|
| C000006557 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.70%
|
| C000006557 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.40%
|
| C000006557 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.00%
|
| C000006557 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.90%
|
| C000006557 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006557 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000006557 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.30%
|
| C000006557 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006557 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006557 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006557 [Member] | Fixed Income Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
38.90%
|
| C000006557 [Member] | US Government Debt Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006557 [Member] | Federal Agencies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.10%
|
| C000006557 [Member] | Non Fixed Income [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006558 [Member] | Fitch, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.60%
|
| C000006558 [Member] | Fitch, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.60%
|
| C000006558 [Member] | Fitch, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.70%
|
| C000006558 [Member] | Fitch, CCC Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006558 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006558 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006558 [Member] | Money Market Funds Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006558 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006558 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.10%
|
| C000006558 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.70%
|
| C000006558 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.40%
|
| C000006558 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.00%
|
| C000006558 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.90%
|
| C000006558 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006558 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000006558 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.30%
|
| C000006558 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006558 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006558 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006558 [Member] | Fixed Income Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
38.90%
|
| C000006558 [Member] | US Government Debt Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006558 [Member] | Federal Agencies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.10%
|
| C000006558 [Member] | Non Fixed Income [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006547 [Member] | Fitch, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.60%
|
| C000006547 [Member] | Fitch, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.60%
|
| C000006547 [Member] | Fitch, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.70%
|
| C000006547 [Member] | Fitch, CCC Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006547 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000006547 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000006547 [Member] | Money Market Funds Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006547 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006547 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.10%
|
| C000006547 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.70%
|
| C000006547 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.40%
|
| C000006547 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.00%
|
| C000006547 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.90%
|
| C000006547 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000006547 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000006547 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.30%
|
| C000006547 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000006547 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000006547 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000006547 [Member] | Fixed Income Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
38.90%
|
| C000006547 [Member] | US Government Debt Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000006547 [Member] | Federal Agencies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.10%
|
| C000006547 [Member] | Non Fixed Income [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000116934 [Member] | Fitch, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.60%
|
| C000116934 [Member] | Fitch, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.60%
|
| C000116934 [Member] | Fitch, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.70%
|
| C000116934 [Member] | Fitch, CCC Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000116934 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.00%
|
| C000116934 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000116934 [Member] | Money Market Funds Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000116934 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000116934 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.10%
|
| C000116934 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.70%
|
| C000116934 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.40%
|
| C000116934 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.00%
|
| C000116934 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.90%
|
| C000116934 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000116934 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000116934 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.30%
|
| C000116934 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000116934 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|
| C000116934 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000116934 [Member] | Fixed Income Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
38.90%
|
| C000116934 [Member] | US Government Debt Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000116934 [Member] | Federal Agencies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.10%
|
| C000116934 [Member] | Non Fixed Income [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
60.10%
|