| Document and Entity Information | Jul. 27, 2023 |
| Cover [Abstract] | |
| Amendment Flag | true |
| Entity Central Index Key | 0001512673 |
| Document Type | 8-K/A |
| Document Period End Date | Jul. 27, 2023 |
| Entity Registrant Name | Block, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-37622 |
| Entity Tax Identification Number | 80-0429876 |
| Entity Address, Address Line One | 1955 Broadway |
| Entity Address, Address Line Two | Suite 600 |
| Entity Address, City or Town | Oakland |
| Entity Address, Address Line Three | CA 946121 |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94612 |
| City Area Code | (415) |
| Local Phone Number | 375-3176 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Class A Common Stock, $0.0000001 par value per share |
| Trading Symbol | SQ |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Amendment Description | Block, Inc. (the “Company”) is filing this amendment to its Current Report on Form 8-K filed on July 27, 2023, which reported that the Company’s Board of Directors (the “Board”) had elected Neha Narula as a new director of the Company. At the time of her election, Ms. Narula’s Board committee appointments had not been determined. On October 26, 2023, the Board appointed Ms. Narula to the Nominating and Corporate Governance Committee, effective immediately. |
