v3.25.2
Shareholder Report, Holdings (Details)
Jun. 30, 2025
C000151117 | U.S. Treasury Notes  
Holdings [Line Items]  
Percent of Net Asset Value 30.80%
C000151117 | Brazil Notas do Tesouro Nacional  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000151117 | Deutsche Bundesrepublik  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
C000151117 | Government of New Zealand  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000151117 | Kingdom of Thailand  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000151117 | U.S. Treasury Bills  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000151117 | United Mexican States  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000151117 | Republic of Serbia  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000151117 | Government of Malaysia  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000151117 | Federal National Mortgage Assn.  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000151117 | Government Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 34.30%
C000151117 | U.S. Government Agency Obligations (Excluding Mortgage-Backed)  
Holdings [Line Items]  
Percent of Net Asset Value 32.50%
C000151117 | Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000151117 | Securities Lending Collateral  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
C000151117 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000151117 | U.S. Government & Agency Mortgage-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000151117 | Asset-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000151117 | Convertible Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000151117 | Other Holdings Grouping  
Holdings [Line Items]  
Percent of Net Asset Value (4.70%)
C000151118 | U.S. Treasury Notes  
Holdings [Line Items]  
Percent of Net Asset Value 30.80%
C000151118 | Brazil Notas do Tesouro Nacional  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000151118 | Deutsche Bundesrepublik  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
C000151118 | Government of New Zealand  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000151118 | Kingdom of Thailand  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000151118 | U.S. Treasury Bills  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000151118 | United Mexican States  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000151118 | Republic of Serbia  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000151118 | Government of Malaysia  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000151118 | Federal National Mortgage Assn.  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000151118 | Government Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 34.30%
C000151118 | U.S. Government Agency Obligations (Excluding Mortgage-Backed)  
Holdings [Line Items]  
Percent of Net Asset Value 32.50%
C000151118 | Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000151118 | Securities Lending Collateral  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
C000151118 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000151118 | U.S. Government & Agency Mortgage-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000151118 | Asset-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000151118 | Convertible Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000151118 | Other Holdings Grouping  
Holdings [Line Items]  
Percent of Net Asset Value (4.70%)
C000159134 | U.S. Treasury Notes  
Holdings [Line Items]  
Percent of Net Asset Value 30.80%
C000159134 | Brazil Notas do Tesouro Nacional  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000159134 | Deutsche Bundesrepublik  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
C000159134 | Government of New Zealand  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000159134 | Kingdom of Thailand  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000159134 | U.S. Treasury Bills  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000159134 | United Mexican States  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000159134 | Republic of Serbia  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000159134 | Government of Malaysia  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000159134 | Federal National Mortgage Assn.  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000159134 | Government Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 34.30%
C000159134 | U.S. Government Agency Obligations (Excluding Mortgage-Backed)  
Holdings [Line Items]  
Percent of Net Asset Value 32.50%
C000159134 | Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000159134 | Securities Lending Collateral  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
C000159134 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000159134 | U.S. Government & Agency Mortgage-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000159134 | Asset-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000159134 | Convertible Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000159134 | Other Holdings Grouping  
Holdings [Line Items]  
Percent of Net Asset Value (4.70%)
C000219340 | U.S. Treasury Notes  
Holdings [Line Items]  
Percent of Net Asset Value 30.80%
C000219340 | Brazil Notas do Tesouro Nacional  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000219340 | Deutsche Bundesrepublik  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
C000219340 | Government of New Zealand  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000219340 | Kingdom of Thailand  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000219340 | U.S. Treasury Bills  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000219340 | United Mexican States  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000219340 | Republic of Serbia  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000219340 | Government of Malaysia  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000219340 | Federal National Mortgage Assn.  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000219340 | Government Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 34.30%
C000219340 | U.S. Government Agency Obligations (Excluding Mortgage-Backed)  
Holdings [Line Items]  
Percent of Net Asset Value 32.50%
C000219340 | Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000219340 | Securities Lending Collateral  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
C000219340 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000219340 | U.S. Government & Agency Mortgage-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000219340 | Asset-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000219340 | Convertible Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000219340 | Other Holdings Grouping  
Holdings [Line Items]  
Percent of Net Asset Value (4.70%)