X0101
  
    24F-2NT
    
      LIVE
      
        
          0000880195
          XXXXXXXX
        
        811-06440
      
      N-1A
    
  
  
    
      
        
          Fidelity Aberdeen Street Trust
          
            245 Summer Street
            Boston
            MA
            X1
            02210
          
        
        
          
            
              Fidelity Multi-Asset Index Fund
              S000040658
              true
            
          
        
        
          811-06440
          
            
              033-43529
            
          
        
        
          02/28/2022
          false
          false
        
        
          1538680926
          876152464
          240165264
          1116317728
          422363198
          0
          0.0000927
          39153.07
        
        
          0
          0
        
        
          0
        
        
          39153.07
        
        
          0
        
        
          Laura M. Del Prato
          President and Treasurer
          05/23/2022