SEGMENT AND GEOGRAPHICAL INFORMATION - Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 3,844,727	$ 3,033,874	$ 13,582,669	$ 6,338,608
Segment gross profit	1,133,215	794,455	3,237,780	1,929,719
Corporate and Other
Segment Reporting Information [Line Items]
Revenue	57,650	0	96,643	0
Segment gross profit	15,273	0	25,147	0
Cash App \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	2,393,633	2,068,595	9,763,440	3,796,506
Segment gross profit	511,717	385,124	1,553,255	848,919
Seller \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,393,444	965,279	3,722,586	2,542,102
Segment gross profit	606,225	409,331	1,659,378	1,080,800
Transaction-based revenue
Segment Reporting Information [Line Items]
Revenue	1,297,040	925,294	3,484,245	2,365,967
Revenue	1,297,040	925,294	3,484,245	2,365,967
Transaction-based revenue \| Corporate and Other
Segment Reporting Information [Line Items]
Revenue	0	0	0	0
Transaction-based revenue \| Cash App \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	103,192	80,721	306,101	162,197
Transaction-based revenue \| Seller \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,193,848	844,573	3,178,144	2,203,770
Subscription and services-based revenue
Segment Reporting Information [Line Items]
Revenue	636,841	430,010	1,793,308	1,032,168
Revenue	694,770	447,522	1,937,629	1,090,032
Subscription and services-based revenue \| Corporate and Other
Segment Reporting Information [Line Items]
Revenue	57,650	0	96,643	0
Subscription and services-based revenue \| Cash App \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	474,779	354,110	1,406,313	818,991
Subscription and services-based revenue \| Seller \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	162,341	93,412	434,673	271,041
Hardware revenue
Segment Reporting Information [Line Items]
Revenue	37,255	27,294	109,769	67,291
Revenue	37,255	27,294	109,769	67,291
Hardware revenue \| Corporate and Other
Segment Reporting Information [Line Items]
Revenue	0	0	0	0
Hardware revenue \| Cash App \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	0	0	0	0
Hardware revenue \| Seller \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	37,255	27,294	109,769	67,291
Bitcoin revenue
Segment Reporting Information [Line Items]
Revenue	1,815,662	1,633,764	8,051,026	2,815,318
Revenue	1,815,662	1,633,764	8,051,026	2,815,318
Bitcoin revenue \| Corporate and Other
Segment Reporting Information [Line Items]
Revenue	0	0	0	0
Bitcoin revenue \| Cash App \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,815,662	1,633,764	8,051,026	2,815,318
Bitcoin revenue \| Seller \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0