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Cover page - USD ($) $ in Billions	12 Months Ended
Cover page - USD ($) $ in Billions	Dec. 31, 2024	Feb. 21, 2025	Jun. 30, 2024
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2024
Document Transition Report	false
Entity File Number	001-40465
Entity Registrant Name	Marqeta, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-4306690
Entity Address, Address Line One	180 Grand Avenue
Entity Address, Address Line Two	6th Floor
Entity Address, City or Town	Oakland
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94612
City Area Code	510
Local Phone Number	671-5437
Title of 12(b) Security	Class A common stock, $0.0001 par value per share
Trading Symbol	MQ
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 2.5
Documents Incorporated by Reference	Portions of the registrant’s Proxy Statement for the 2025 Annual Meeting of Stockholders are incorporated herein by reference in Part III of this Annual Report on Form 10-K to the extent stated herein. Such proxy statement will be filed with the Securities and Exchange Commission within 120 days of the registrant’s fiscal year ended December 31, 2024.
Entity Central Index Key	0001522540
Document Fiscal Year Focus	2024
Amendment Flag	false
Document Fiscal Period Focus	FY
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		471,026,371
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		33,295,196