v3.25.2
Shareholder Report, Holdings (Details)
Jun. 30, 2025
C000004007 | Government of Japan  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
C000004007 | Republic of Czech  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000004007 | United Kingdom Gilt  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000004007 | People's Republic of China  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000004007 | Republic of Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000004007 | Republic of France  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000004007 | Government of Malaysia  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000004007 | Italy Buoni Poliennali Del Tesoro  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000004007 | Kingdom of Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000004007 | Deutsche Bundesrepublik  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000004007 | Other Holdings Grouping  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
C000004007 | United States  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
C000004007 | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
C000004007 | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000004007 | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000004007 | Czech Republic  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000004007 | France  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000004007 | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000004007 | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000004007 | China  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000004008 | Government of Japan  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
C000004008 | Republic of Czech  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000004008 | United Kingdom Gilt  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000004008 | People's Republic of China  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000004008 | Republic of Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000004008 | Republic of France  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000004008 | Government of Malaysia  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000004008 | Italy Buoni Poliennali Del Tesoro  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000004008 | Kingdom of Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000004008 | Deutsche Bundesrepublik  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000004008 | Other Holdings Grouping  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
C000004008 | United States  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
C000004008 | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
C000004008 | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000004008 | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000004008 | Czech Republic  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000004008 | France  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000004008 | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000004008 | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000004008 | China  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000159126 | Government of Japan  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
C000159126 | Republic of Czech  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000159126 | United Kingdom Gilt  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000159126 | People's Republic of China  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000159126 | Republic of Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000159126 | Republic of France  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000159126 | Government of Malaysia  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000159126 | Italy Buoni Poliennali Del Tesoro  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000159126 | Kingdom of Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000159126 | Deutsche Bundesrepublik  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000159126 | Other Holdings Grouping  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
C000159126 | United States  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
C000159126 | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
C000159126 | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000159126 | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000159126 | Czech Republic  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000159126 | France  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000159126 | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000159126 | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000159126 | China  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000219335 | Government of Japan  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
C000219335 | Republic of Czech  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000219335 | United Kingdom Gilt  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000219335 | People's Republic of China  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000219335 | Republic of Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000219335 | Republic of France  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000219335 | Government of Malaysia  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000219335 | Italy Buoni Poliennali Del Tesoro  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000219335 | Kingdom of Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000219335 | Deutsche Bundesrepublik  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000219335 | Other Holdings Grouping  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
C000219335 | United States  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
C000219335 | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
C000219335 | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000219335 | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000219335 | Czech Republic  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000219335 | France  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000219335 | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000219335 | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000219335 | China  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%