v3.26.1
Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
VALUE LINE ASSET ALLOCATION FUND INC      
Prospectus [Line Items]      
Average Annual Return, Percent (2.63%) 4.09% 8.15%
VALUE LINE ASSET ALLOCATION FUND INC | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent (5.30%) 2.00% 6.76%
VALUE LINE ASSET ALLOCATION FUND INC | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent [1] 0.10% 3.02% 6.47%
Institutional      
Prospectus [Line Items]      
Average Annual Return, Percent (2.38%) 4.35% 8.42%
S&P 500® Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 17.88% 14.42% 14.82%
60/40 S&P 500® Index/Bloomberg US Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent [2] 13.70% 8.47% 9.78%
[1] The return after taxes on distributions and sale of Fund shares may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the investment period.
[2] This secondary custom index is composed of a 60% weighting in the S&P 500® Index and a 40% weighting in the Bloomberg US Aggregate Bond Index, calculated on a total return basis with dividends reinvested.