Shareholder Report, Holdings (Details)
|
Apr. 30, 2026 |
| C000015044 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.90%
|
| C000015044 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000015044 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
15.10%
|
| C000015044 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.20%
|
| C000015044 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.30%
|
| C000015044 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000015044 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000015044 [Member] | Real Estate Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.70%
|
| C000015044 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
13.50%
|
| C000015044 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
22.50%
|
| C000015044 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.40%
|
| C000015044 [Member] | Common Stock [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
98.90%
|
| C000015044 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000015042 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.90%
|
| C000015042 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000015042 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
15.10%
|
| C000015042 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.20%
|
| C000015042 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.30%
|
| C000015042 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000015042 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000015042 [Member] | Real Estate Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.70%
|
| C000015042 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
13.50%
|
| C000015042 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
22.50%
|
| C000015042 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.40%
|
| C000015042 [Member] | Common Stock [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
98.90%
|
| C000015042 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000015051 [Member] | U S Treasury Obligations Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
33.80%
|
| C000015051 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015051 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015051 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.10%
|
| C000015051 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
24.50%
|
| C000015051 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000015051 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
37.00%
|
| C000015051 [Member] | US Government Corporations and Agencies Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.00%
|
| C000015051 [Member] | Collateralized Mortgage-Backed Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.00%
|
| C000015051 [Member] | U S Treasury Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
33.80%
|
| C000015051 [Member] | Cash Collateral Invested for Securities on Loan [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015051 [Member] | Government Agencies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000015053 [Member] | U S Treasury Obligations Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
33.80%
|
| C000015053 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015053 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015053 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.10%
|
| C000015053 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
24.50%
|
| C000015053 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000015053 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
37.00%
|
| C000015053 [Member] | US Government Corporations and Agencies Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.00%
|
| C000015053 [Member] | Collateralized Mortgage-Backed Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.00%
|
| C000015053 [Member] | U S Treasury Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
33.80%
|
| C000015053 [Member] | Cash Collateral Invested for Securities on Loan [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015053 [Member] | Government Agencies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000015059 [Member] | Other Countries [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.40%
|
| C000015059 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.20%
|
| C000015059 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.00%
|
| C000015059 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
18.10%
|
| C000015059 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
13.20%
|
| C000015059 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.70%
|
| C000015059 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.80%
|
| C000015059 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000015059 [Member] | Real Estate Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000015059 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.80%
|
| C000015059 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
22.10%
|
| C000015059 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000015059 [Member] | UNITED STATES |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.90%
|
| C000015059 [Member] | UNITED KINGDOM |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.20%
|
| C000015059 [Member] | TAIWAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.00%
|
| C000015059 [Member] | SWITZERLAND |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000015059 [Member] | SWEDEN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015059 [Member] | SPAIN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000015059 [Member] | SOUTH AFRICA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000015059 [Member] | NORWAY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000015059 [Member] | NETHERLANDS |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.80%
|
| C000015059 [Member] | MEXICO |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015059 [Member] | KOREA, REPUBLIC OF |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.70%
|
| C000015059 [Member] | JAPAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
13.10%
|
| C000015059 [Member] | INDIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000015059 [Member] | HONG KONG |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000015059 [Member] | GERMANY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.40%
|
| C000015059 [Member] | FRANCE |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.80%
|
| C000015059 [Member] | CHINA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.50%
|
| C000015059 [Member] | CANADA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.00%
|
| C000015059 [Member] | BRAZIL |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.60%
|
| C000015059 [Member] | AUSTRALIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000015059 [Member] | AUSTRIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000015059 [Member] | Common Stock [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
91.20%
|
| C000015059 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.20%
|
| C000015059 [Member] | Cash Collateral Invested for Securities on Loan [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.70%
|
| C000015059 [Member] | Long Equity Index Futures Notional Value [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.30%
|
| C000015059 [Member] | Exchange Traded Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000015057 [Member] | Other Countries [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.40%
|
| C000015057 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.20%
|
| C000015057 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.00%
|
| C000015057 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
18.10%
|
| C000015057 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
13.20%
|
| C000015057 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.70%
|
| C000015057 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.80%
|
| C000015057 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000015057 [Member] | Real Estate Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000015057 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.80%
|
| C000015057 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
22.10%
|
| C000015057 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000015057 [Member] | UNITED STATES |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.90%
|
| C000015057 [Member] | UNITED KINGDOM |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.20%
|
| C000015057 [Member] | TAIWAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.00%
|
| C000015057 [Member] | SWITZERLAND |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000015057 [Member] | SWEDEN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015057 [Member] | SPAIN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000015057 [Member] | SOUTH AFRICA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000015057 [Member] | NORWAY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000015057 [Member] | NETHERLANDS |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.80%
|
| C000015057 [Member] | MEXICO |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015057 [Member] | KOREA, REPUBLIC OF |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.70%
|
| C000015057 [Member] | JAPAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
13.10%
|
| C000015057 [Member] | INDIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000015057 [Member] | HONG KONG |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000015057 [Member] | GERMANY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.40%
|
| C000015057 [Member] | FRANCE |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.80%
|
| C000015057 [Member] | CHINA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.50%
|
| C000015057 [Member] | CANADA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.00%
|
| C000015057 [Member] | BRAZIL |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.60%
|
| C000015057 [Member] | AUSTRALIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000015057 [Member] | AUSTRIA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000015057 [Member] | Common Stock [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
91.20%
|
| C000015057 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.20%
|
| C000015057 [Member] | Cash Collateral Invested for Securities on Loan [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.70%
|
| C000015057 [Member] | Long Equity Index Futures Notional Value [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.30%
|
| C000015057 [Member] | Exchange Traded Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000015273 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.60%
|
| C000015273 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015273 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
50.10%
|
| C000015273 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
24.20%
|
| C000015273 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
17.70%
|
| C000015273 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000015273 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000015273 [Member] | General [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
21.60%
|
| C000015273 [Member] | Higher Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.70%
|
| C000015273 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.60%
|
| C000015273 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.70%
|
| C000015273 [Member] | Medical [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.60%
|
| C000015273 [Member] | School District [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.00%
|
| C000015273 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000015273 [Member] | Power [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.50%
|
| C000015273 [Member] | Water [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000015273 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015273 [Member] | General Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
17.60%
|
| C000015275 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.60%
|
| C000015275 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015275 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
50.10%
|
| C000015275 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
24.20%
|
| C000015275 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
17.70%
|
| C000015275 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000015275 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000015275 [Member] | General [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
21.60%
|
| C000015275 [Member] | Higher Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.70%
|
| C000015275 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.60%
|
| C000015275 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.70%
|
| C000015275 [Member] | Medical [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.60%
|
| C000015275 [Member] | School District [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.00%
|
| C000015275 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000015275 [Member] | Power [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.50%
|
| C000015275 [Member] | Water [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.80%
|
| C000015275 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000015275 [Member] | General Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
17.60%
|
| C000247853 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000247853 [Member] | U S Treasury Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
58.80%
|
| C000247853 [Member] | Repurchase Agreements [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
40.20%
|
| C000015425 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000015425 [Member] | U S Treasury Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
58.80%
|
| C000015425 [Member] | Repurchase Agreements [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
40.20%
|
| C000015424 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000015424 [Member] | U S Treasury Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
58.80%
|
| C000015424 [Member] | Repurchase Agreements [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
40.20%
|
| C000215930 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000215930 [Member] | U S Treasury Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
58.80%
|
| C000215930 [Member] | Repurchase Agreements [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
40.20%
|
| C000015427 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000015427 [Member] | U S Treasury Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
58.80%
|
| C000015427 [Member] | Repurchase Agreements [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
40.20%
|
| C000015430 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000015430 [Member] | US Government Corporations and Agencies Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
21.40%
|
| C000015430 [Member] | U S Treasury Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
37.30%
|
| C000015430 [Member] | Repurchase Agreements [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
40.30%
|
| C000109084 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000109084 [Member] | US Government Corporations and Agencies Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
21.40%
|
| C000109084 [Member] | U S Treasury Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
37.30%
|
| C000109084 [Member] | Repurchase Agreements [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
40.30%
|
| C000015429 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000015429 [Member] | US Government Corporations and Agencies Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
21.40%
|
| C000015429 [Member] | U S Treasury Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
37.30%
|
| C000015429 [Member] | Repurchase Agreements [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
40.30%
|
| C000015428 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000015428 [Member] | US Government Corporations and Agencies Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
21.40%
|
| C000015428 [Member] | U S Treasury Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
37.30%
|
| C000015428 [Member] | Repurchase Agreements [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
40.30%
|
| C000247854 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000247854 [Member] | US Government Corporations and Agencies Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
21.40%
|
| C000247854 [Member] | U S Treasury Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
37.30%
|
| C000247854 [Member] | Repurchase Agreements [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
40.30%
|
| C000107165 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.40%
|
| C000107165 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.80%
|
| C000107165 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
28.40%
|
| C000107165 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
47.80%
|
| C000107165 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.60%
|
| C000107165 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.70%
|
| C000107165 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.70%
|
| C000107165 [Member] | General [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
22.10%
|
| C000107165 [Member] | Higher Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.30%
|
| C000107165 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.80%
|
| C000107165 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.00%
|
| C000107165 [Member] | Medical [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.90%
|
| C000107165 [Member] | School District [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.40%
|
| C000107165 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000107165 [Member] | Power [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.80%
|
| C000107165 [Member] | Water [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.70%
|
| C000107165 [Member] | Tobacco Settlement [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.30%
|
| C000107165 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.30%
|
| C000107165 [Member] | General Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
13.00%
|
| C000107165 [Member] | Student Loan [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000107164 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.40%
|
| C000107164 [Member] | Not Rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.80%
|
| C000107164 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
28.40%
|
| C000107164 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
47.80%
|
| C000107164 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.60%
|
| C000107164 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.70%
|
| C000107164 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.70%
|
| C000107164 [Member] | General [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
22.10%
|
| C000107164 [Member] | Higher Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.30%
|
| C000107164 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.80%
|
| C000107164 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.00%
|
| C000107164 [Member] | Medical [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.90%
|
| C000107164 [Member] | School District [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.40%
|
| C000107164 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000107164 [Member] | Power [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.80%
|
| C000107164 [Member] | Water [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.70%
|
| C000107164 [Member] | Tobacco Settlement [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.30%
|
| C000107164 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.30%
|
| C000107164 [Member] | General Obligations [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
13.00%
|
| C000107164 [Member] | Student Loan [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000107168 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000107168 [Member] | Cash Collateral Invested for Securities on Loan [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.70%
|
| C000107168 [Member] | Real Estate Related Real Estate Investment Trusts [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
31.40%
|
| C000107168 [Member] | Real Estate Related Exchange Traded Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.30%
|
| C000107168 [Member] | Real Estate Related Common Stocks [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.10%
|
| C000107168 [Member] | Real Estate Related Investment Company [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.40%
|
| C000107168 [Member] | Commodity Related Investment Companies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
45.80%
|
| C000107168 [Member] | Commodity Related Exchange Traded Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.90%
|
| C000107169 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000107169 [Member] | Cash Collateral Invested for Securities on Loan [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.70%
|
| C000107169 [Member] | Real Estate Related Real Estate Investment Trusts [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
31.40%
|
| C000107169 [Member] | Real Estate Related Exchange Traded Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.30%
|
| C000107169 [Member] | Real Estate Related Common Stocks [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.10%
|
| C000107169 [Member] | Real Estate Related Investment Company [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.40%
|
| C000107169 [Member] | Commodity Related Investment Companies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
45.80%
|
| C000107169 [Member] | Commodity Related Exchange Traded Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.90%
|
| C000107171 [Member] | Other Countries [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.70%
|
| C000107171 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.60%
|
| C000107171 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000107171 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
21.40%
|
| C000107171 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.90%
|
| C000107171 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.80%
|
| C000107171 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.00%
|
| C000107171 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.90%
|
| C000107171 [Member] | Real Estate Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.60%
|
| C000107171 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.60%
|
| C000107171 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.60%
|
| C000107171 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.30%
|
| C000107171 [Member] | UNITED STATES |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
46.00%
|
| C000107171 [Member] | UNITED KINGDOM |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.10%
|
| C000107171 [Member] | TAIWAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.70%
|
| C000107171 [Member] | SWITZERLAND |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000107171 [Member] | NETHERLANDS |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.30%
|
| C000107171 [Member] | KOREA, REPUBLIC OF |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000107171 [Member] | JAPAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.40%
|
| C000107171 [Member] | HONG KONG |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000107171 [Member] | GERMANY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.20%
|
| C000107171 [Member] | FRANCE |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.70%
|
| C000107171 [Member] | CHINA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000107171 [Member] | CANADA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.00%
|
| C000107171 [Member] | ITALY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.30%
|
| C000107171 [Member] | Common Stock [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
94.80%
|
| C000107171 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000107171 [Member] | Long Equity Index Futures Notional Value [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000107171 [Member] | Exchange Traded Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.30%
|
| C000107171 [Member] | Short Equity Index Futures Notional Value [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
(47.10%)
|
| C000107171 [Member] | Preferred Stock [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.20%
|
| C000107170 [Member] | Other Countries [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.70%
|
| C000107170 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.60%
|
| C000107170 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000107170 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
21.40%
|
| C000107170 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.90%
|
| C000107170 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.80%
|
| C000107170 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.00%
|
| C000107170 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.90%
|
| C000107170 [Member] | Real Estate Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.60%
|
| C000107170 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.60%
|
| C000107170 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.60%
|
| C000107170 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.30%
|
| C000107170 [Member] | UNITED STATES |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
46.00%
|
| C000107170 [Member] | UNITED KINGDOM |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.10%
|
| C000107170 [Member] | TAIWAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.70%
|
| C000107170 [Member] | SWITZERLAND |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000107170 [Member] | NETHERLANDS |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.30%
|
| C000107170 [Member] | KOREA, REPUBLIC OF |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000107170 [Member] | JAPAN |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.40%
|
| C000107170 [Member] | HONG KONG |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000107170 [Member] | GERMANY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.20%
|
| C000107170 [Member] | FRANCE |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.70%
|
| C000107170 [Member] | CHINA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000107170 [Member] | CANADA |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.00%
|
| C000107170 [Member] | ITALY |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.30%
|
| C000107170 [Member] | Common Stock [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
94.80%
|
| C000107170 [Member] | Money Market Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000107170 [Member] | Long Equity Index Futures Notional Value [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000107170 [Member] | Exchange Traded Funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.30%
|
| C000107170 [Member] | Short Equity Index Futures Notional Value [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
(47.10%)
|
| C000107170 [Member] | Preferred Stock [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.20%
|
| C000107172 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.30%
|
| C000107172 [Member] | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000107172 [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
33.00%
|
| C000107172 [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.80%
|
| C000107172 [Member] | Consumer Staples Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000107172 [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.10%
|
| C000107172 [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.70%
|
| C000107172 [Member] | Real Estate Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.20%
|
| C000107172 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.50%
|
| C000107172 [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.30%
|
| C000107172 [Member] | Energy Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.50%
|
| C000107172 [Member] | Common Stock [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
99.20%
|
| C000107172 [Member] | Cash Collateral Invested for Securities on Loan [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.70%
|
| C000107172 [Member] | Investment Companies [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.10%
|