Cover Page - shares	3 Months Ended
	Mar. 31, 2022	Apr. 29, 2022
Class of Stock [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-37622
Entity Registrant Name	Block, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	80-0429876
City Area Code	415
Local Phone Number	375-3176
Title of 12(b) Security	Class A common stock, $0.0000001 par value per share
Trading Symbol	SQ
Security Exchange Name	NYSE
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
Entity Shell Company	false
Entity Central Index Key	0001512673
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false
Class A
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding		518,807,380
Class B
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding		61,696,578