Shareholder Report, Holdings (Details)

Jan. 31, 2026

C000010996 [Member] | Agency Collateralized Mortgage Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.01%

C000010996 [Member] | Supranational Banks [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.19%

C000010996 [Member] | Non Agency Commercial Mortgage Backed Security [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.87%

C000010996 [Member] | Government Agency Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.84%

C000010996 [Member] | Loan Agreements [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.76%

C000010996 [Member] | Common Stock [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.47%

C000010996 [Member] | Sovereign Debt [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

C000010996 [Member] | Collateralized Loan Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.77%

C000010996 [Member] | Corporate Bond Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

56.65%

C000010995 [Member] | Agency Collateralized Mortgage Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.01%

C000010995 [Member] | Supranational Banks [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.19%

C000010995 [Member] | Non Agency Commercial Mortgage Backed Security [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.87%

C000010995 [Member] | Government Agency Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.84%

C000010995 [Member] | Loan Agreements [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.76%

C000010995 [Member] | Common Stock [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.47%

C000010995 [Member] | Sovereign Debt [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

C000010995 [Member] | Collateralized Loan Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.77%

C000010995 [Member] | Corporate Bond Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

56.65%

C000010994 [Member] | Agency Collateralized Mortgage Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.01%

C000010994 [Member] | Supranational Banks [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.19%

C000010994 [Member] | Non Agency Commercial Mortgage Backed Security [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.87%

C000010994 [Member] | Government Agency Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.84%

C000010994 [Member] | Loan Agreements [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.76%

C000010994 [Member] | Common Stock [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.47%

C000010994 [Member] | Sovereign Debt [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

C000010994 [Member] | Collateralized Loan Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.77%

C000010994 [Member] | Corporate Bond Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

56.65%

C000010992 [Member] | Agency Collateralized Mortgage Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.01%

C000010992 [Member] | Supranational Banks [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.19%

C000010992 [Member] | Non Agency Commercial Mortgage Backed Security [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.87%

C000010992 [Member] | Government Agency Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.84%

C000010992 [Member] | Loan Agreements [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.76%

C000010992 [Member] | Common Stock [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.47%

C000010992 [Member] | Sovereign Debt [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

C000010992 [Member] | Collateralized Loan Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.77%

C000010992 [Member] | Corporate Bond Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

56.65%

C000130079 [Member] | Banking [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.66%

^[1]

C000130079 [Member] | Oil and Gas [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.79%

^[1]

C000130079 [Member] | Consumer Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.18%

^[1]

C000130079 [Member] | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.10%

^[1]

C000130079 [Member] | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

19.70%

^[1]

C000130079 [Member] | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.59%

^[1]

C000130079 [Member] | Utilities Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.99%

^[1]

C000130079 [Member] | Technology Media and Telecommunication [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.36%

^[1]

C000130079 [Member] | Basic Industry [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.45%

^[1]

C000130079 [Member] | Metals and Mining [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.48%

^[1]

C000130079 [Member] | ARGENTINA

Holdings [Line Items]

Percent of Net Asset Value

5.33%

C000130079 [Member] | BRAZIL

Holdings [Line Items]

Percent of Net Asset Value

8.16%

C000130079 [Member] | CHILE

Holdings [Line Items]

Percent of Net Asset Value

4.99%

C000130079 [Member] | GUATEMALA

Holdings [Line Items]

Percent of Net Asset Value

3.54%

C000130079 [Member] | INDIA

Holdings [Line Items]

Percent of Net Asset Value

4.10%

C000130079 [Member] | KOREA, REPUBLIC OF

Holdings [Line Items]

Percent of Net Asset Value

3.58%

C000130079 [Member] | MEXICO

Holdings [Line Items]

Percent of Net Asset Value

7.82%

C000130079 [Member] | SAUDI ARABIA

Holdings [Line Items]

Percent of Net Asset Value

3.46%

C000130079 [Member] | TÜRKIYE

Holdings [Line Items]

Percent of Net Asset Value

3.70%

C000130079 [Member] | UNITED ARAB EMIRATES

Holdings [Line Items]

Percent of Net Asset Value

3.24%

C000130080 [Member] | Banking [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.66%

^[2]

C000130080 [Member] | Oil and Gas [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.79%

^[2]

C000130080 [Member] | Consumer Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.18%

^[2]

C000130080 [Member] | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.10%

^[2]

C000130080 [Member] | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

19.70%

^[2]

C000130080 [Member] | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.59%

^[2]

C000130080 [Member] | Utilities Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.99%

^[2]

C000130080 [Member] | Technology Media and Telecommunication [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.36%

^[2]

C000130080 [Member] | Basic Industry [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.45%

^[2]

C000130080 [Member] | Metals and Mining [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.48%

^[2]

C000130080 [Member] | ARGENTINA

Holdings [Line Items]

Percent of Net Asset Value

5.33%

C000130080 [Member] | BRAZIL

Holdings [Line Items]

Percent of Net Asset Value

8.16%

C000130080 [Member] | CHILE

Holdings [Line Items]

Percent of Net Asset Value

4.99%

C000130080 [Member] | GUATEMALA

Holdings [Line Items]

Percent of Net Asset Value

3.54%

C000130080 [Member] | INDIA

Holdings [Line Items]

Percent of Net Asset Value

4.10%

C000130080 [Member] | KOREA, REPUBLIC OF

Holdings [Line Items]

Percent of Net Asset Value

3.58%

C000130080 [Member] | MEXICO

Holdings [Line Items]

Percent of Net Asset Value

7.82%

C000130080 [Member] | SAUDI ARABIA

Holdings [Line Items]

Percent of Net Asset Value

3.46%

C000130080 [Member] | TÜRKIYE

Holdings [Line Items]

Percent of Net Asset Value

3.70%

C000130080 [Member] | UNITED ARAB EMIRATES

Holdings [Line Items]

Percent of Net Asset Value

3.24%

C000130082 [Member] | Banking [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.66%

^[3]

C000130082 [Member] | Oil and Gas [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.79%

^[3]

C000130082 [Member] | Consumer Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.18%

^[3]

C000130082 [Member] | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.10%

^[3]

C000130082 [Member] | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

19.70%

^[3]

C000130082 [Member] | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.59%

^[3]

C000130082 [Member] | Utilities Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.99%

^[3]

C000130082 [Member] | Technology Media and Telecommunication [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.36%

^[3]

C000130082 [Member] | Basic Industry [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.45%

^[3]

C000130082 [Member] | Metals and Mining [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.48%

^[3]

C000130082 [Member] | ARGENTINA

Holdings [Line Items]

Percent of Net Asset Value

5.33%

C000130082 [Member] | BRAZIL

Holdings [Line Items]

Percent of Net Asset Value

8.16%

C000130082 [Member] | CHILE

Holdings [Line Items]

Percent of Net Asset Value

4.99%

C000130082 [Member] | GUATEMALA

Holdings [Line Items]

Percent of Net Asset Value

3.54%

C000130082 [Member] | INDIA

Holdings [Line Items]

Percent of Net Asset Value

4.10%

C000130082 [Member] | KOREA, REPUBLIC OF

Holdings [Line Items]

Percent of Net Asset Value

3.58%

C000130082 [Member] | MEXICO

Holdings [Line Items]

Percent of Net Asset Value

7.82%

C000130082 [Member] | SAUDI ARABIA

Holdings [Line Items]

Percent of Net Asset Value

3.46%

C000130082 [Member] | TÜRKIYE

Holdings [Line Items]

Percent of Net Asset Value

3.70%

C000130082 [Member] | UNITED ARAB EMIRATES

Holdings [Line Items]

Percent of Net Asset Value

3.24%

[1]	Categorizations used for financial reporting purposes may differ from categorizations used for regulatory compliance and/or internal classification purposes.
[2]	Categorizations used for financial reporting purposes may differ from categorizations used for regulatory compliance and/or internal classification purposes.
[3]	Categorizations used for financial reporting purposes may differ from categorizations used for regulatory compliance and/or internal classification purposes.