v3.26.1
Shareholder Report, Holdings (Details)
Apr. 30, 2026
C000013484 | Not Rated  
Holdings [Line Items]  
Percent of Total Investments 5.40%
C000013484 | CCC or Lower  
Holdings [Line Items]  
Percent of Total Investments 9.20%
C000013484 | B  
Holdings [Line Items]  
Percent of Total Investments 37.30%
C000013484 | BB  
Holdings [Line Items]  
Percent of Total Investments 45.30%
C000013484 | BBB  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000013484 | Asset Other Line  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000013484 | AssetShort-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000013484 | AssetSenior Floating-Rate Loans  
Holdings [Line Items]  
Percent of Total Investments 9.70%
C000013484 | AssetCorporate Bonds  
Holdings [Line Items]  
Percent of Total Investments 84.30%
C000013486 | Not Rated  
Holdings [Line Items]  
Percent of Total Investments 5.40%
C000013486 | CCC or Lower  
Holdings [Line Items]  
Percent of Total Investments 9.20%
C000013486 | B  
Holdings [Line Items]  
Percent of Total Investments 37.30%
C000013486 | BB  
Holdings [Line Items]  
Percent of Total Investments 45.30%
C000013486 | BBB  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000013486 | Asset Other Line  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000013486 | AssetShort-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000013486 | AssetSenior Floating-Rate Loans  
Holdings [Line Items]  
Percent of Total Investments 9.70%
C000013486 | AssetCorporate Bonds  
Holdings [Line Items]  
Percent of Total Investments 84.30%
C000013488 | Not Rated  
Holdings [Line Items]  
Percent of Total Investments 5.40%
C000013488 | CCC or Lower  
Holdings [Line Items]  
Percent of Total Investments 9.20%
C000013488 | B  
Holdings [Line Items]  
Percent of Total Investments 37.30%
C000013488 | BB  
Holdings [Line Items]  
Percent of Total Investments 45.30%
C000013488 | BBB  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000013488 | Asset Other Line  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000013488 | AssetShort-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000013488 | AssetSenior Floating-Rate Loans  
Holdings [Line Items]  
Percent of Total Investments 9.70%
C000013488 | AssetCorporate Bonds  
Holdings [Line Items]  
Percent of Total Investments 84.30%
C000013487 | Not Rated  
Holdings [Line Items]  
Percent of Total Investments 5.40%
C000013487 | CCC or Lower  
Holdings [Line Items]  
Percent of Total Investments 9.20%
C000013487 | B  
Holdings [Line Items]  
Percent of Total Investments 37.30%
C000013487 | BB  
Holdings [Line Items]  
Percent of Total Investments 45.30%
C000013487 | BBB  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000013487 | Asset Other Line  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000013487 | AssetShort-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000013487 | AssetSenior Floating-Rate Loans  
Holdings [Line Items]  
Percent of Total Investments 9.70%
C000013487 | AssetCorporate Bonds  
Holdings [Line Items]  
Percent of Total Investments 84.30%
C000142452 | Not Rated  
Holdings [Line Items]  
Percent of Total Investments 5.40%
C000142452 | CCC or Lower  
Holdings [Line Items]  
Percent of Total Investments 9.20%
C000142452 | B  
Holdings [Line Items]  
Percent of Total Investments 37.30%
C000142452 | BB  
Holdings [Line Items]  
Percent of Total Investments 45.30%
C000142452 | BBB  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000142452 | Asset Other Line  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000142452 | AssetShort-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000142452 | AssetSenior Floating-Rate Loans  
Holdings [Line Items]  
Percent of Total Investments 9.70%
C000142452 | AssetCorporate Bonds  
Holdings [Line Items]  
Percent of Total Investments 84.30%