v3.25.4
Shareholder Report, Holdings (Details)
Dec. 31, 2025
C000001703 [Member] | Investments Purchased with Collateral from Securities Lending [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60%
C000001703 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 94.30%
C000001703 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000001702 [Member] | Investments Purchased with Collateral from Securities Lending [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60%
C000001702 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 94.30%
C000001702 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000001700 [Member] | Investments Purchased with Collateral from Securities Lending [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60%
C000001700 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 94.30%
C000001700 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000001704 [Member] | Investments Purchased with Collateral from Securities Lending [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000001704 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 98.30%
C000001704 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000001706 [Member] | Investments Purchased with Collateral from Securities Lending [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000001706 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 98.30%
C000001706 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000123977 [Member] | Investments Purchased with Collateral from Securities Lending [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000123977 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 98.30%
C000123977 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000001707 [Member] | Investments Purchased with Collateral from Securities Lending [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000001707 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 98.30%
C000001707 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000039985 [Member] | Investments Purchased with Collateral from Securities Lending [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000039985 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 94.40%
C000039985 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000039984 [Member] | Investments Purchased with Collateral from Securities Lending [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000039984 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 94.40%
C000039984 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000039982 [Member] | Investments Purchased with Collateral from Securities Lending [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000039982 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 94.40%
C000039982 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000039986 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 94.40%
C000039986 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000039988 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 94.40%
C000039988 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000171397 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 94.40%
C000171397 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000039989 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 94.40%
C000039989 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000079621 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.40%
C000079621 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 57.00%
C000079621 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000079621 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000079621 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000079621 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000079621 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000079621 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Total Investments 6.50%
C000079621 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000079621 [Member] | FINLAND  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000079621 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000079621 [Member] | Investments Purchased with Collateral from Securities Lending [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30%
C000079621 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 95.60%
C000079621 [Member] | Convertible Preferred Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000079621 [Member] | Structured Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000079619 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.40%
C000079619 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 57.00%
C000079619 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000079619 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000079619 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000079619 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000079619 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000079619 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Total Investments 6.50%
C000079619 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000079619 [Member] | FINLAND  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000079619 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000079619 [Member] | Investments Purchased with Collateral from Securities Lending [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30%
C000079619 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 95.60%
C000079619 [Member] | Convertible Preferred Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000079619 [Member] | Structured Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000079618 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.40%
C000079618 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 57.00%
C000079618 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000079618 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000079618 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000079618 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000079618 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000079618 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Total Investments 6.50%
C000079618 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000079618 [Member] | FINLAND  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000079618 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000079618 [Member] | Investments Purchased with Collateral from Securities Lending [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30%
C000079618 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 95.60%
C000079618 [Member] | Convertible Preferred Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000079618 [Member] | Structured Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%