Shareholder Report, Holdings (Details)

May 31, 2026

C000024768 | Preferred Stocks

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[1]

C000024768 | Mortgage-Backed Securities

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[1]

C000024768 | Common Stocks

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[1]

C000024768 | Municipal Bonds

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[1]

C000024768 | Cash Equivalents

Holdings [Line Items]

Percent of Net Asset Value

0.40%

C000024768 | Corporate Debt Securities

Holdings [Line Items]

Percent of Net Asset Value

98.40%

C000024770 | Preferred Stocks

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[2]

C000024770 | Mortgage-Backed Securities

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[2]

C000024770 | Common Stocks

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[2]

C000024770 | Municipal Bonds

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[2]

C000024770 | Cash Equivalents

Holdings [Line Items]

Percent of Net Asset Value

0.40%

C000024770 | Corporate Debt Securities

Holdings [Line Items]

Percent of Net Asset Value

98.40%

C000024771 | Preferred Stocks

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[3]

C000024771 | Mortgage-Backed Securities

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[3]

C000024771 | Common Stocks

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[3]

C000024771 | Municipal Bonds

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[3]

C000024771 | Cash Equivalents

Holdings [Line Items]

Percent of Net Asset Value

0.40%

C000024771 | Corporate Debt Securities

Holdings [Line Items]

Percent of Net Asset Value

98.40%

C000062220 | Preferred Stocks

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[4]

C000062220 | Mortgage-Backed Securities

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[4]

C000062220 | Common Stocks

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[4]

C000062220 | Municipal Bonds

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[4]

C000062220 | Cash Equivalents

Holdings [Line Items]

Percent of Net Asset Value

0.40%

C000062220 | Corporate Debt Securities

Holdings [Line Items]

Percent of Net Asset Value

98.40%

C000173769 | Preferred Stocks

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[5]

C000173769 | Mortgage-Backed Securities

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[5]

C000173769 | Common Stocks

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[5]

C000173769 | Municipal Bonds

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[5]

C000173769 | Cash Equivalents

Holdings [Line Items]

Percent of Net Asset Value

0.40%

C000173769 | Corporate Debt Securities

Holdings [Line Items]

Percent of Net Asset Value

98.40%

[1]	Represents less than 0.1%.
[2]	Represents less than 0.1%.
[3]	Represents less than 0.1%.
[4]	Represents less than 0.1%.
[5]	Represents less than 0.1%.