| Document and Entity Information | May 02, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | May 02, 2024 |
| 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 1 | 1955 Broadway |
| Entity Address Address Line 2 | Suite 600 |
| Entity Address City Or Town | Oakland |
| 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 |
| Entity Central Index Key | 0001512673 |
| Amendment Flag | false |
