Concentrations of Risk - Schedule of diversification of the Account's portfolio by region and property type (Details) - Geographic Concentration Risk - Portfolio Fair Value or Net Equity Value	6 Months Ended
	Jun. 30, 2025
Industrial, Apartments, Office, Retail, and Other
Concentration Risk [Line Items]
Total	100.00%
Industrial
Concentration Risk [Line Items]
Total	35.10%
Apartment
Concentration Risk [Line Items]
Total	28.20%
Office
Concentration Risk [Line Items]
Total	16.20%
Retail
Concentration Risk [Line Items]
Total	13.30%
Other
Concentration Risk [Line Items]
Total	7.20%
West \| Industrial, Apartments, Office, Retail, and Other
Concentration Risk [Line Items]
Total	38.10%
West \| Industrial
Concentration Risk [Line Items]
Total	18.70%
West \| Apartment
Concentration Risk [Line Items]
Total	8.20%
West \| Office
Concentration Risk [Line Items]
Total	4.30%
West \| Retail
Concentration Risk [Line Items]
Total	4.60%
West \| Other
Concentration Risk [Line Items]
Total	2.30%
South \| Industrial, Apartments, Office, Retail, and Other
Concentration Risk [Line Items]
Total	33.50%
South \| Industrial
Concentration Risk [Line Items]
Total	10.80%
South \| Apartment
Concentration Risk [Line Items]
Total	10.60%
South \| Office
Concentration Risk [Line Items]
Total	4.80%
South \| Retail
Concentration Risk [Line Items]
Total	4.80%
South \| Other
Concentration Risk [Line Items]
Total	2.50%
East \| Industrial, Apartments, Office, Retail, and Other
Concentration Risk [Line Items]
Total	23.60%
East \| Industrial
Concentration Risk [Line Items]
Total	3.20%
East \| Apartment
Concentration Risk [Line Items]
Total	8.80%
East \| Office
Concentration Risk [Line Items]
Total	6.90%
East \| Retail
Concentration Risk [Line Items]
Total	3.20%
East \| Other
Concentration Risk [Line Items]
Total	1.50%
Midwest \| Industrial, Apartments, Office, Retail, and Other
Concentration Risk [Line Items]
Total	4.20%
Midwest \| Industrial
Concentration Risk [Line Items]
Total	2.40%
Midwest \| Apartment
Concentration Risk [Line Items]
Total	0.60%
Midwest \| Office
Concentration Risk [Line Items]
Total	0.20%
Midwest \| Retail
Concentration Risk [Line Items]
Total	0.70%
Midwest \| Other
Concentration Risk [Line Items]
Total	0.30%
Foreign \| Industrial, Apartments, Office, Retail, and Other
Concentration Risk [Line Items]
Total	0.60%
Foreign \| Industrial
Concentration Risk [Line Items]
Total	0.00%
Foreign \| Apartment
Concentration Risk [Line Items]
Total	0.00%
Foreign \| Office
Concentration Risk [Line Items]
Total	0.00%
Foreign \| Retail
Concentration Risk [Line Items]
Total	0.00%
Foreign \| Other
Concentration Risk [Line Items]
Total	0.60%