v3.25.1
Shareholder Report, Average Annual Return (Details)
 6 Months Ended 12 Months Ended 60 Months Ended 120 Months Ended
Mar. 31, 2025
Mar. 31, 2025
Mar. 31, 2025
Mar. 31, 2025
C000085566        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name The Gabelli Enterprise Mergers and Acquisitions Fund - Class AAA      
C000049132        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name The Gabelli Enterprise Mergers and Acquisitions Fund - Class C      
Average Annual Return, Percent 1.95% 7.36% 7.01% 2.92%
C000049133        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name The Gabelli Enterprise Mergers and Acquisitions Fund - Class Y      
C000049130        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name The Gabelli Enterprise Mergers and Acquisitions Fund - Class A      
Average Annual Return, Percent (2.54%) 2.94% 6.55% 2.97%
Without Sales Load [Member] | C000085566        
Average Annual Return [Line Items]        
Average Annual Return, Percent 3.37% 9.20% 7.83% 3.70%
Without Sales Load [Member] | C000049132        
Average Annual Return [Line Items]        
Average Annual Return, Percent 2.95% 8.36% 7.01% 2.92%
Without Sales Load [Member] | C000049133        
Average Annual Return [Line Items]        
Average Annual Return, Percent 3.85% 10.22% 8.61% 4.20%
Without Sales Load [Member] | C000049130        
Average Annual Return [Line Items]        
Average Annual Return, Percent 3.40% 9.22% 7.82% 3.58%
S&P 500 Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent (1.97%) 8.25% 18.59% 12.50%
S&P 500 Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent (1.97%) 8.25% 18.59% 12.50%
S&P 500 Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent (1.97%) 8.25% 18.59% 12.50%
S&P 500 Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent (1.97%) 8.25% 18.59% 12.50%
Lipper U.S. Treasury Money-Market Fund Average        
Average Annual Return [Line Items]        
Average Annual Return, Percent 2.14% 4.72% 2.41% 1.61%
S&P Merger Arbitrage Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 2.26% 7.63% 4.69% 3.36%
Lipper U.S. Treasury Money-Market Fund Average        
Average Annual Return [Line Items]        
Average Annual Return, Percent 2.14% 4.72% 2.41% 1.61%
S&P Merger Arbitrage Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 2.26% 7.63% 4.69% 3.36%
Lipper U.S. Treasury Money-Market Fund Average        
Average Annual Return [Line Items]        
Average Annual Return, Percent 2.14% 4.72% 2.41% 1.61%
S&P Merger Arbitrage Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 2.26% 7.63% 4.69% 3.36%
Lipper U.S. Treasury Money-Market Fund Average        
Average Annual Return [Line Items]        
Average Annual Return, Percent 2.14% 4.72% 2.41% 1.61%
S&P Merger Arbitrage Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 2.26% 7.63% 4.69% 3.36%