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Business Combination - Narrative (Details) $ / shares in Units, $ in Thousands | Aug. 05, 2022 USD ($) $ / shares shares | Sep. 30, 2022 shares | Aug. 04, 2022 shares | Dec. 31, 2021 shares
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Schedule Of Reverse Recapitalization [Line Items] |  |  |  |
Exchange ratio | 1.4541326 |  |  |
Sale of stock, price (in usd per share) | $ / shares | $ 10 |  |  |
Cash - PIPE Investment | $ | $ 40,000 |  |  |
Net proceeds received | $ | $ 21,385 |  |  |
Stock forfeited (in shares) |  |  | 4,484,425 |
Conversion ratio | 0.889657 |  |  |
Common stock, outstanding (in shares) | 110,007,972 | 110,377,357 |  | 2,817,498
Private Placement [Member] |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |
Issuance of common stock (in shares) | 5,816,528 |  |  |
D-Wave Systems Inc. Stockholders |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |
Exchange of common stock (in shares) | 99,736,752 |  |  |
DCPM Class A common stock subject to redemption |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |
Common stock, outstanding (in shares) |  |  | 30,000,000 |
Stock redeemed (in shares) |  |  | 29,097,787 |
DCPM Class A common stock |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |
Stock exchanged (in shares) | 902,213 |  |  |
DCPM Class A common stock | DPCM Capital, Inc. Stockholders |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |
Exchange of common stock (in shares) | 1,311,937 |  |  |
DCPM Class B common stock |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |
Common stock, outstanding (in shares) | 3,015,575 |  | 7,500,000 |
DCPM Class B common stock | DPCM Capital, Inc. Stockholders |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |
Exchange of common stock (in shares) | 3,015,575 |  |  |
D-Wave Systems common stock |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |
Common stock, outstanding (in shares) |  |  | 112,106,972 |
Exchangeable Shares [Member] | D-Wave Systems Inc. Stockholders |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |
Exchange of common stock (in shares) | 48,409,601 |  |  |

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