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Business Combination - Common Stock (Details) - shares
 9 Months Ended
Aug. 05, 2022
Sep. 30, 2022
Aug. 04, 2022
Dec. 31, 2021
Schedule Of Reverse Recapitalization [Line Items]        
Business Combination and PIPE shares (in shares) 10,144,040      
Common stock, outstanding (in shares) 110,007,972 110,377,357   2,817,498
DCPM Class B common stock        
Schedule Of Reverse Recapitalization [Line Items]        
Common stock, outstanding (in shares) 3,015,575   7,500,000  
DPCM Capital, Inc. Stockholders | DCPM Class A common stock        
Schedule Of Reverse Recapitalization [Line Items]        
Exchange of common stock (in shares) 1,311,937      
DPCM Capital, Inc. Stockholders | DCPM Class B common stock        
Schedule Of Reverse Recapitalization [Line Items]        
Exchange of common stock (in shares) 3,015,575      
D-Wave Systems Inc. Stockholders        
Schedule Of Reverse Recapitalization [Line Items]        
Exchange of common stock (in shares) 99,736,752      
ELOC        
Schedule Of Reverse Recapitalization [Line Items]        
Issuance of common stock (in shares) 127,180 381,540    
PIPE        
Schedule Of Reverse Recapitalization [Line Items]        
Issuance of common stock (in shares) 5,816,528