Cover - USD ($)	12 Months Ended
	Dec. 31, 2022	Mar. 17, 2023
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-41468
Entity Registrant Name	D-Wave Quantum Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	88-1068854
Entity Address, Address Line One	3033 Beta Avenue
Entity Address, City or Town	Burnaby
Entity Address, State or Province	BC
Entity Address, Country	CA
Entity Address, Postal Zip Code	V5G 4M9
City Area Code	604
Local Phone Number	630-1428
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	No
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float	$ 56,760,600
Entity Common Stock, Shares Outstanding		80,390,676
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement for the 2023 Annual Meeting of Shareholders are incorporated by reference into Part III of this report. Such proxy statement will be filed with the Securities and Exchange Commission within 120 days of the registrant’s fiscal year ended December 31, 2022.
Entity Central Index Key	0001907982
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Common stock, par value $0.0001 per share
Document Information [Line Items]
Title of 12(b) Security	Common stock, par value $0.0001 per share
Trading Symbol	QBTS
Security Exchange Name	NYSE
Warrants, each whole warrant exercisable for 1.4541326 shares of common stock at an exercise price of $11.50
Document Information [Line Items]
Title of 12(b) Security	Warrants, each whole warrant exercisable for 1.4541326 shares of common stock at an exercise price of $11.50
Trading Symbol	QBTS.WT
Security Exchange Name	NYSE