| Cover page | Nov. 10, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Nov. 10, 2021 |
| Entity Registrant Name | MARQETA, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-40465 |
| 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 | 888 |
| Local Phone Number | 462-7738 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A common stock, $0.0001 par value per share |
| Trading Symbol | MQ |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001522540 |
| Amendment Flag | false |
