v3.25.2
Shareholder Report, Holdings (Details)
May 31, 2025
C000005534 | Blackstone Partners Offshore Fund  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000005534 | T. Rowe Price Multi-Strategy Total Return Fund - I Class  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000005534 | T. Rowe Price International Bond Fund (USD Hedged) - I Class  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000005534 | T. Rowe Price Dynamic Global Bond Fund - I Class  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000005534 | U.S. Treasury Notes  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000005534 | T. Rowe Price Emerging Markets Bond Fund - I Class  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000005534 | T. Rowe Price Institutional High Yield Fund - Institutional Class  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
C000005534 | T. Rowe Price Institutional Emerging Markets Equity Fund  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000005534 | U.S. Treasury Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000005534 | T. Rowe Price Real Assets Fund - I Class  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000005534 | Common Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 33.80%
C000005534 | Bond Funds  
Holdings [Line Items]  
Percent of Net Asset Value 24.50%
C000005534 | Equity Funds  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000005534 | U.S. Government Agency Obligations (Excluding Mortgage-Backed)  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
C000005534 | Private Investment Companies  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000005534 | Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000005534 | U.S. Government & Agency Mortgage-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000005534 | Asset-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000005534 | Other Holdings Grouping  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000169940 | Blackstone Partners Offshore Fund  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000169940 | T. Rowe Price Multi-Strategy Total Return Fund - I Class  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000169940 | T. Rowe Price International Bond Fund (USD Hedged) - I Class  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000169940 | T. Rowe Price Dynamic Global Bond Fund - I Class  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000169940 | U.S. Treasury Notes  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000169940 | T. Rowe Price Emerging Markets Bond Fund - I Class  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000169940 | T. Rowe Price Institutional High Yield Fund - Institutional Class  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
C000169940 | T. Rowe Price Institutional Emerging Markets Equity Fund  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000169940 | U.S. Treasury Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000169940 | T. Rowe Price Real Assets Fund - I Class  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000169940 | Common Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 33.80%
C000169940 | Bond Funds  
Holdings [Line Items]  
Percent of Net Asset Value 24.50%
C000169940 | Equity Funds  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000169940 | U.S. Government Agency Obligations (Excluding Mortgage-Backed)  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
C000169940 | Private Investment Companies  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000169940 | Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000169940 | U.S. Government & Agency Mortgage-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000169940 | Asset-Backed Securities  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000169940 | Other Holdings Grouping  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%