v3.26.1
Shareholder Report, Holdings (Details)
May 31, 2026
C000016782 | Eli Lilly & Co.  
Holdings [Line Items]  
Percent of Net Asset Value 13.90%
C000016782 | Johnson & Johnson  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
C000016782 | UnitedHealth Group, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000016782 | AbbVie, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000016782 | Merck & Co., Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000016782 | AstraZeneca PLC  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000016782 | Thermo Fisher Scientific, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000016782 | Novartis AG  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000016782 | Amgen, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000016782 | Gilead Sciences, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000016782 | Pharmaceuticals  
Holdings [Line Items]  
Percent of Net Asset Value 39.00%
C000016782 | Biotechnology  
Holdings [Line Items]  
Percent of Net Asset Value 20.00%
C000016782 | Health Care Equipment  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
C000016782 | Life Sciences Tools & Services  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
C000016782 | Managed Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000016782 | Health Care Distributors  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000016782 | Health Care Services  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000016782 | Health Care Supplies  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000016782 | Health Care Technology  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016782 | AssetCommon Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000016782 | AssetCash Equivalents  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016782 | AssetRights  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016782 | Asset Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016785 | Eli Lilly & Co.  
Holdings [Line Items]  
Percent of Net Asset Value 13.90%
C000016785 | Johnson & Johnson  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
C000016785 | UnitedHealth Group, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000016785 | AbbVie, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000016785 | Merck & Co., Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000016785 | AstraZeneca PLC  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000016785 | Thermo Fisher Scientific, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000016785 | Novartis AG  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000016785 | Amgen, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000016785 | Gilead Sciences, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000016785 | Pharmaceuticals  
Holdings [Line Items]  
Percent of Net Asset Value 39.00%
C000016785 | Biotechnology  
Holdings [Line Items]  
Percent of Net Asset Value 20.00%
C000016785 | Health Care Equipment  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
C000016785 | Life Sciences Tools & Services  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
C000016785 | Managed Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000016785 | Health Care Distributors  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000016785 | Health Care Services  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000016785 | Health Care Supplies  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000016785 | Health Care Technology  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016785 | AssetCommon Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000016785 | AssetCash Equivalents  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016785 | AssetRights  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016785 | Asset Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016786 | Eli Lilly & Co.  
Holdings [Line Items]  
Percent of Net Asset Value 13.90%
C000016786 | Johnson & Johnson  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
C000016786 | UnitedHealth Group, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000016786 | AbbVie, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000016786 | Merck & Co., Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000016786 | AstraZeneca PLC  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000016786 | Thermo Fisher Scientific, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000016786 | Novartis AG  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000016786 | Amgen, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000016786 | Gilead Sciences, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000016786 | Pharmaceuticals  
Holdings [Line Items]  
Percent of Net Asset Value 39.00%
C000016786 | Biotechnology  
Holdings [Line Items]  
Percent of Net Asset Value 20.00%
C000016786 | Health Care Equipment  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
C000016786 | Life Sciences Tools & Services  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
C000016786 | Managed Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000016786 | Health Care Distributors  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000016786 | Health Care Services  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000016786 | Health Care Supplies  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000016786 | Health Care Technology  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016786 | AssetCommon Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000016786 | AssetCash Equivalents  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016786 | AssetRights  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016786 | Asset Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016787 | Eli Lilly & Co.  
Holdings [Line Items]  
Percent of Net Asset Value 13.90%
C000016787 | Johnson & Johnson  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
C000016787 | UnitedHealth Group, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000016787 | AbbVie, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000016787 | Merck & Co., Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000016787 | AstraZeneca PLC  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000016787 | Thermo Fisher Scientific, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000016787 | Novartis AG  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000016787 | Amgen, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000016787 | Gilead Sciences, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000016787 | Pharmaceuticals  
Holdings [Line Items]  
Percent of Net Asset Value 39.00%
C000016787 | Biotechnology  
Holdings [Line Items]  
Percent of Net Asset Value 20.00%
C000016787 | Health Care Equipment  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
C000016787 | Life Sciences Tools & Services  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
C000016787 | Managed Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000016787 | Health Care Distributors  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000016787 | Health Care Services  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000016787 | Health Care Supplies  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000016787 | Health Care Technology  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016787 | AssetCommon Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000016787 | AssetCash Equivalents  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016787 | AssetRights  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000016787 | Asset Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%