Shareholder Report, Holdings (Details)

Dec. 31, 2025

C000130461 [Member] | Net Other Assets and Liabilities Country [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.80%

C000130461 [Member] | UNITED STATES

Holdings [Line Items]

Percent of Net Asset Value

63.50%

C000130461 [Member] | UNITED KINGDOM

Holdings [Line Items]

Percent of Net Asset Value

4.50%

C000130461 [Member] | SPAIN

Holdings [Line Items]

Percent of Net Asset Value

1.40%

C000130461 [Member] | KOREA, REPUBLIC OF

Holdings [Line Items]

Percent of Net Asset Value

4.10%

C000130461 [Member] | JAPAN

Holdings [Line Items]

Percent of Net Asset Value

3.00%

C000130461 [Member] | ITALY

Holdings [Line Items]

Percent of Net Asset Value

2.90%

C000130461 [Member] | FRANCE

Holdings [Line Items]

Percent of Net Asset Value

1.30%

C000130461 [Member] | COLOMBIA

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000130461 [Member] | CHINA

Holdings [Line Items]

Percent of Net Asset Value

3.60%

C000130461 [Member] | CANADA

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000130461 [Member] | BRAZIL

Holdings [Line Items]

Percent of Net Asset Value

1.10%

C000130461 [Member] | AUSTRALIA

Holdings [Line Items]

Percent of Net Asset Value

2.40%

C000130461 [Member] | Corporate Bonds and Notes [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.00%

C000130461 [Member] | Net Other Assets and Liabilities [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.00%

C000130461 [Member] | Forward Foreign Currency Exchange Contracts [Member]

Holdings [Line Items]

Percent of Net Asset Value

(0.30%)

C000130461 [Member] | Options Contracts [Member]

Holdings [Line Items]

Percent of Net Asset Value

(0.00%)

^[1]

C000130461 [Member] | Swap Agreements [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[1]

C000130461 [Member] | Investment Companies [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

C000130461 [Member] | U S Government Agencies Mortgage Backed [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.50%

C000130461 [Member] | Foreign Governmental [Member]

Holdings [Line Items]

Percent of Net Asset Value

30.80%

C000130461 [Member] | Commercial Mortgage-Backed Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.70%

C000130461 [Member] | Asset-Backed Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

C000130461 [Member] | US Treasury Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

44.90%

C000130461 [Member] | Collateralized Loan Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.70%

C000130461 [Member] | Future [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.10%

C000031763 [Member] | Net Other Assets and Liabilities Country [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.80%

C000031763 [Member] | UNITED STATES

Holdings [Line Items]

Percent of Net Asset Value

63.50%

C000031763 [Member] | UNITED KINGDOM

Holdings [Line Items]

Percent of Net Asset Value

4.50%

C000031763 [Member] | SPAIN

Holdings [Line Items]

Percent of Net Asset Value

1.40%

C000031763 [Member] | KOREA, REPUBLIC OF

Holdings [Line Items]

Percent of Net Asset Value

4.10%

C000031763 [Member] | JAPAN

Holdings [Line Items]

Percent of Net Asset Value

3.00%

C000031763 [Member] | ITALY

Holdings [Line Items]

Percent of Net Asset Value

2.90%

C000031763 [Member] | FRANCE

Holdings [Line Items]

Percent of Net Asset Value

1.30%

C000031763 [Member] | COLOMBIA

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000031763 [Member] | CHINA

Holdings [Line Items]

Percent of Net Asset Value

3.60%

C000031763 [Member] | CANADA

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000031763 [Member] | BRAZIL

Holdings [Line Items]

Percent of Net Asset Value

1.10%

C000031763 [Member] | AUSTRALIA

Holdings [Line Items]

Percent of Net Asset Value

2.40%

C000031763 [Member] | Corporate Bonds and Notes [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.00%

C000031763 [Member] | Net Other Assets and Liabilities [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.00%

C000031763 [Member] | Forward Foreign Currency Exchange Contracts [Member]

Holdings [Line Items]

Percent of Net Asset Value

(0.30%)

C000031763 [Member] | Options Contracts [Member]

Holdings [Line Items]

Percent of Net Asset Value

(0.00%)

^[2]

C000031763 [Member] | Swap Agreements [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[2]

C000031763 [Member] | Investment Companies [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

C000031763 [Member] | U S Government Agencies Mortgage Backed [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.50%

C000031763 [Member] | Foreign Governmental [Member]

Holdings [Line Items]

Percent of Net Asset Value

30.80%

C000031763 [Member] | Commercial Mortgage-Backed Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.70%

C000031763 [Member] | Asset-Backed Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

C000031763 [Member] | US Treasury Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

44.90%

C000031763 [Member] | Collateralized Loan Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.70%

C000031763 [Member] | Future [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.10%

C000081695 [Member] | Net Other Assets and Liabilities Country [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.80%

C000081695 [Member] | UNITED STATES

Holdings [Line Items]

Percent of Net Asset Value

63.50%

C000081695 [Member] | UNITED KINGDOM

Holdings [Line Items]

Percent of Net Asset Value

4.50%

C000081695 [Member] | SPAIN

Holdings [Line Items]

Percent of Net Asset Value

1.40%

C000081695 [Member] | KOREA, REPUBLIC OF

Holdings [Line Items]

Percent of Net Asset Value

4.10%

C000081695 [Member] | JAPAN

Holdings [Line Items]

Percent of Net Asset Value

3.00%

C000081695 [Member] | ITALY

Holdings [Line Items]

Percent of Net Asset Value

2.90%

C000081695 [Member] | FRANCE

Holdings [Line Items]

Percent of Net Asset Value

1.30%

C000081695 [Member] | COLOMBIA

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000081695 [Member] | CHINA

Holdings [Line Items]

Percent of Net Asset Value

3.60%

C000081695 [Member] | CANADA

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000081695 [Member] | BRAZIL

Holdings [Line Items]

Percent of Net Asset Value

1.10%

C000081695 [Member] | AUSTRALIA

Holdings [Line Items]

Percent of Net Asset Value

2.40%

C000081695 [Member] | Corporate Bonds and Notes [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.00%

C000081695 [Member] | Net Other Assets and Liabilities [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.00%

C000081695 [Member] | Forward Foreign Currency Exchange Contracts [Member]

Holdings [Line Items]

Percent of Net Asset Value

(0.30%)

C000081695 [Member] | Options Contracts [Member]

Holdings [Line Items]

Percent of Net Asset Value

(0.00%)

^[3]

C000081695 [Member] | Swap Agreements [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[3]

C000081695 [Member] | Investment Companies [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

C000081695 [Member] | U S Government Agencies Mortgage Backed [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.50%

C000081695 [Member] | Foreign Governmental [Member]

Holdings [Line Items]

Percent of Net Asset Value

30.80%

C000081695 [Member] | Commercial Mortgage-Backed Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.70%

C000081695 [Member] | Asset-Backed Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

C000081695 [Member] | US Treasury Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

44.90%

C000081695 [Member] | Collateralized Loan Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.70%

C000081695 [Member] | Future [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.10%

C000081694 [Member] | Net Other Assets and Liabilities Country [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.80%

C000081694 [Member] | UNITED STATES

Holdings [Line Items]

Percent of Net Asset Value

63.50%

C000081694 [Member] | UNITED KINGDOM

Holdings [Line Items]

Percent of Net Asset Value

4.50%

C000081694 [Member] | SPAIN

Holdings [Line Items]

Percent of Net Asset Value

1.40%

C000081694 [Member] | KOREA, REPUBLIC OF

Holdings [Line Items]

Percent of Net Asset Value

4.10%

C000081694 [Member] | JAPAN

Holdings [Line Items]

Percent of Net Asset Value

3.00%

C000081694 [Member] | ITALY

Holdings [Line Items]

Percent of Net Asset Value

2.90%

C000081694 [Member] | FRANCE

Holdings [Line Items]

Percent of Net Asset Value

1.30%

C000081694 [Member] | COLOMBIA

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000081694 [Member] | CHINA

Holdings [Line Items]

Percent of Net Asset Value

3.60%

C000081694 [Member] | CANADA

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000081694 [Member] | BRAZIL

Holdings [Line Items]

Percent of Net Asset Value

1.10%

C000081694 [Member] | AUSTRALIA

Holdings [Line Items]

Percent of Net Asset Value

2.40%

C000081694 [Member] | Corporate Bonds and Notes [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.00%

C000081694 [Member] | Net Other Assets and Liabilities [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.00%

C000081694 [Member] | Forward Foreign Currency Exchange Contracts [Member]

Holdings [Line Items]

Percent of Net Asset Value

(0.30%)

C000081694 [Member] | Options Contracts [Member]

Holdings [Line Items]

Percent of Net Asset Value

(0.00%)

^[4]

C000081694 [Member] | Swap Agreements [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.00%

^[4]

C000081694 [Member] | Investment Companies [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

C000081694 [Member] | U S Government Agencies Mortgage Backed [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.50%

C000081694 [Member] | Foreign Governmental [Member]

Holdings [Line Items]

Percent of Net Asset Value

30.80%

C000081694 [Member] | Commercial Mortgage-Backed Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.70%

C000081694 [Member] | Asset-Backed Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

C000081694 [Member] | US Treasury Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

44.90%

C000081694 [Member] | Collateralized Loan Obligations [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.70%

C000081694 [Member] | Future [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.10%

[1]	Amount represents less than .1%.
[2]	Amount represents less than .1%.
[3]	Amount represents less than .1%.
[4]	Amount represents less than .1%.