v3.26.1
Shareholder Report, Holdings (Details)
May 31, 2026
C000005526 | Top10HoldingU.S. Treasury Inflation-Indexed NotesBNY-91282CJY8  
Holdings [Line Items]  
Percent of Net Asset Value 86.10%
C000005526 | Top10HoldingU.S. Treasury Inflation-Indexed BondsBNY-912810TY4  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
C000005526 | Top10HoldingGS Mortgage-Backed Securities TrustBNY-36250BAE6  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000005526 | Other0BNY-36250BAE6  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000005526 | 0BNY-91282CJY8  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
C000005526 | 0BNY-36250BAE6  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000166332 | Top10HoldingU.S. Treasury Inflation-Indexed NotesBNY-91282CJY8  
Holdings [Line Items]  
Percent of Net Asset Value 86.10%
C000166332 | Top10HoldingU.S. Treasury Inflation-Indexed BondsBNY-912810TY4  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
C000166332 | Top10HoldingGS Mortgage-Backed Securities TrustBNY-36250BAE6  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000166332 | Other0BNY-36250BAE6  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000166332 | 0BNY-91282CJY8  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
C000166332 | 0BNY-36250BAE6  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000225818 | Top10HoldingU.S. Treasury Inflation-Indexed NotesBNY-91282CJY8  
Holdings [Line Items]  
Percent of Net Asset Value 86.10%
C000225818 | Top10HoldingU.S. Treasury Inflation-Indexed BondsBNY-912810TY4  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
C000225818 | Top10HoldingGS Mortgage-Backed Securities TrustBNY-36250BAE6  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000225818 | Other0BNY-36250BAE6  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000225818 | 0BNY-91282CJY8  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
C000225818 | 0BNY-36250BAE6  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%