v3.26.1
Shareholder Report, Holdings (Details)
Mar. 31, 2026
C000028113 | Other Assets and Liabilities Country Weighting  
Holdings [Line Items]  
Percent of Net Asset Value (10.70%)
C000028113 | Short-Term Investments Asset Weighting  
Holdings [Line Items]  
Percent of Net Asset Value (10.70%)
C000028113 | USD  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
C000028113 | Short-Term Investments Country Weighting  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000028113 | United States  
Holdings [Line Items]  
Percent of Net Asset Value 49.00%
C000028113 | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000028113 | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000028113 | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
C000028113 | France  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000028113 | Italy  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028113 | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000028113 | China  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000028113 | Australia  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028113 | South Africa  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000028113 | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028113 | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000028113 | Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000028113 | Governments - Treasuries  
Holdings [Line Items]  
Percent of Net Asset Value 44.70%
C000028113 | Corporates - Investment Grade  
Holdings [Line Items]  
Percent of Net Asset Value 25.50%
C000028113 | Mortgage Pass-Throughs  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000028113 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000028113 | Collateralized Loan Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028113 | Commercial Mortgage-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000028113 | Asset-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028113 | Covered Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028113 | Corporates - Non-Investment Grade  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000028113 | Emerging Markets - Treasuries  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028113 | Governments - Sovereign Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000028113 | Governments - Sovereign Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000028113 | Others  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000028113 | Short-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000057412 | Other Assets and Liabilities Country Weighting  
Holdings [Line Items]  
Percent of Net Asset Value (10.70%)
C000057412 | Short-Term Investments Asset Weighting  
Holdings [Line Items]  
Percent of Net Asset Value (10.70%)
C000057412 | USD  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
C000057412 | Short-Term Investments Country Weighting  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000057412 | United States  
Holdings [Line Items]  
Percent of Net Asset Value 49.00%
C000057412 | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000057412 | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000057412 | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
C000057412 | France  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000057412 | Italy  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000057412 | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000057412 | China  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000057412 | Australia  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000057412 | South Africa  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000057412 | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000057412 | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000057412 | Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000057412 | Governments - Treasuries  
Holdings [Line Items]  
Percent of Net Asset Value 44.70%
C000057412 | Corporates - Investment Grade  
Holdings [Line Items]  
Percent of Net Asset Value 25.50%
C000057412 | Mortgage Pass-Throughs  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000057412 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000057412 | Collateralized Loan Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000057412 | Commercial Mortgage-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000057412 | Asset-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000057412 | Covered Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000057412 | Corporates - Non-Investment Grade  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000057412 | Emerging Markets - Treasuries  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000057412 | Governments - Sovereign Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000057412 | Governments - Sovereign Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000057412 | Others  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000057412 | Short-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000028115 | Other Assets and Liabilities Country Weighting  
Holdings [Line Items]  
Percent of Net Asset Value (10.70%)
C000028115 | Short-Term Investments Asset Weighting  
Holdings [Line Items]  
Percent of Net Asset Value (10.70%)
C000028115 | USD  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
C000028115 | Short-Term Investments Country Weighting  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000028115 | United States  
Holdings [Line Items]  
Percent of Net Asset Value 49.00%
C000028115 | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000028115 | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000028115 | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
C000028115 | France  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000028115 | Italy  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028115 | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000028115 | China  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000028115 | Australia  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028115 | South Africa  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000028115 | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028115 | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000028115 | Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000028115 | Governments - Treasuries  
Holdings [Line Items]  
Percent of Net Asset Value 44.70%
C000028115 | Corporates - Investment Grade  
Holdings [Line Items]  
Percent of Net Asset Value 25.50%
C000028115 | Mortgage Pass-Throughs  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000028115 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000028115 | Collateralized Loan Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028115 | Commercial Mortgage-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000028115 | Asset-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028115 | Covered Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028115 | Corporates - Non-Investment Grade  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000028115 | Emerging Markets - Treasuries  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028115 | Governments - Sovereign Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000028115 | Governments - Sovereign Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000028115 | Others  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000028115 | Short-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000057411 | Other Assets and Liabilities Country Weighting  
Holdings [Line Items]  
Percent of Net Asset Value (10.70%)
C000057411 | Short-Term Investments Asset Weighting  
Holdings [Line Items]  
Percent of Net Asset Value (10.70%)
C000057411 | USD  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
C000057411 | Short-Term Investments Country Weighting  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000057411 | United States  
Holdings [Line Items]  
Percent of Net Asset Value 49.00%
C000057411 | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000057411 | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000057411 | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
C000057411 | France  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000057411 | Italy  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000057411 | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000057411 | China  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000057411 | Australia  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000057411 | South Africa  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000057411 | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000057411 | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000057411 | Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000057411 | Governments - Treasuries  
Holdings [Line Items]  
Percent of Net Asset Value 44.70%
C000057411 | Corporates - Investment Grade  
Holdings [Line Items]  
Percent of Net Asset Value 25.50%
C000057411 | Mortgage Pass-Throughs  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000057411 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000057411 | Collateralized Loan Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000057411 | Commercial Mortgage-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000057411 | Asset-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000057411 | Covered Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000057411 | Corporates - Non-Investment Grade  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000057411 | Emerging Markets - Treasuries  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000057411 | Governments - Sovereign Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000057411 | Governments - Sovereign Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000057411 | Others  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000057411 | Short-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000135460 | Other Assets and Liabilities Country Weighting  
Holdings [Line Items]  
Percent of Net Asset Value (10.70%)
C000135460 | Short-Term Investments Asset Weighting  
Holdings [Line Items]  
Percent of Net Asset Value (10.70%)
C000135460 | USD  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
C000135460 | Short-Term Investments Country Weighting  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000135460 | United States  
Holdings [Line Items]  
Percent of Net Asset Value 49.00%
C000135460 | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000135460 | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000135460 | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
C000135460 | France  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000135460 | Italy  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000135460 | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000135460 | China  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000135460 | Australia  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000135460 | South Africa  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000135460 | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000135460 | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000135460 | Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000135460 | Governments - Treasuries  
Holdings [Line Items]  
Percent of Net Asset Value 44.70%
C000135460 | Corporates - Investment Grade  
Holdings [Line Items]  
Percent of Net Asset Value 25.50%
C000135460 | Mortgage Pass-Throughs  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000135460 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000135460 | Collateralized Loan Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000135460 | Commercial Mortgage-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000135460 | Asset-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000135460 | Covered Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000135460 | Corporates - Non-Investment Grade  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000135460 | Emerging Markets - Treasuries  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000135460 | Governments - Sovereign Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000135460 | Governments - Sovereign Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000135460 | Others  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000135460 | Short-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%