Shareholder Report, Holdings (Details)	Jun. 30, 2025
C000005423 \| U.S. Treasury Notes
Holdings [Line Items]
Percent of Net Asset Value	7.70%
C000005423 \| T. Rowe Price Real Assets Fund - I Class
Holdings [Line Items]
Percent of Net Asset Value	4.30%
C000005423 \| T. Rowe Price Institutional High Yield Fund - Institutional Class
Holdings [Line Items]
Percent of Net Asset Value	3.90%
C000005423 \| Federal National Mortgage Assn.
Holdings [Line Items]
Percent of Net Asset Value	3.60%
C000005423 \| Microsoft
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000005423 \| NVIDIA
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000005423 \| U.S. Treasury Bonds
Holdings [Line Items]
Percent of Net Asset Value	2.40%
C000005423 \| Apple
Holdings [Line Items]
Percent of Net Asset Value	1.80%
C000005423 \| Amazon.com
Holdings [Line Items]
Percent of Net Asset Value	1.80%
C000005423 \| Government National Mortgage Assn.
Holdings [Line Items]
Percent of Net Asset Value	1.60%
C000005423 \| Common Stocks
Holdings [Line Items]
Percent of Net Asset Value	60.70%
C000005423 \| U.S. Government Agency Obligations (Excluding Mortgage-Backed)
Holdings [Line Items]
Percent of Net Asset Value	10.10%
C000005423 \| U.S. Government & Agency Mortgage-Backed Securities
Holdings [Line Items]
Percent of Net Asset Value	7.40%
C000005423 \| Corporate Bonds
Holdings [Line Items]
Percent of Net Asset Value	6.80%
C000005423 \| Bond Funds
Holdings [Line Items]
Percent of Net Asset Value	4.80%
C000005423 \| Equity Funds
Holdings [Line Items]
Percent of Net Asset Value	4.30%
C000005423 \| Asset-Backed Securities
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000005423 \| Non-U.S. Government Mortgage-Backed Securities
Holdings [Line Items]
Percent of Net Asset Value	0.80%
C000005423 \| Other Holdings Grouping
Holdings [Line Items]
Percent of Net Asset Value	4.10%
C000166328 \| U.S. Treasury Notes
Holdings [Line Items]
Percent of Net Asset Value	7.70%
C000166328 \| T. Rowe Price Real Assets Fund - I Class
Holdings [Line Items]
Percent of Net Asset Value	4.30%
C000166328 \| T. Rowe Price Institutional High Yield Fund - Institutional Class
Holdings [Line Items]
Percent of Net Asset Value	3.90%
C000166328 \| Federal National Mortgage Assn.
Holdings [Line Items]
Percent of Net Asset Value	3.60%
C000166328 \| Microsoft
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000166328 \| NVIDIA
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000166328 \| U.S. Treasury Bonds
Holdings [Line Items]
Percent of Net Asset Value	2.40%
C000166328 \| Apple
Holdings [Line Items]
Percent of Net Asset Value	1.80%
C000166328 \| Amazon.com
Holdings [Line Items]
Percent of Net Asset Value	1.80%
C000166328 \| Government National Mortgage Assn.
Holdings [Line Items]
Percent of Net Asset Value	1.60%
C000166328 \| Common Stocks
Holdings [Line Items]
Percent of Net Asset Value	60.70%
C000166328 \| U.S. Government Agency Obligations (Excluding Mortgage-Backed)
Holdings [Line Items]
Percent of Net Asset Value	10.10%
C000166328 \| U.S. Government & Agency Mortgage-Backed Securities
Holdings [Line Items]
Percent of Net Asset Value	7.40%
C000166328 \| Corporate Bonds
Holdings [Line Items]
Percent of Net Asset Value	6.80%
C000166328 \| Bond Funds
Holdings [Line Items]
Percent of Net Asset Value	4.80%
C000166328 \| Equity Funds
Holdings [Line Items]
Percent of Net Asset Value	4.30%
C000166328 \| Asset-Backed Securities
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000166328 \| Non-U.S. Government Mortgage-Backed Securities
Holdings [Line Items]
Percent of Net Asset Value	0.80%
C000166328 \| Other Holdings Grouping
Holdings [Line Items]
Percent of Net Asset Value	4.10%