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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Reclassifications of Previously Reported Segment Information (Details) - USD ($) $ in Millions	3 Months Ended						6 Months Ended			9 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023		Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023		Sep. 30, 2023	Dec. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	$ 5,073	$ 4,409	$ 3,927	$ 3,585	[1]	$ 3,186	$ 9,406	$ 6,771	[1]	$ 10,698	$ 15,107
As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				3,415				6,452
Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				170				319
Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	2,970			1,936			5,466	3,612
Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	2,103			1,649			3,940	3,159
Services | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	2,502			1,584			4,630	2,999
Services | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,215			1,041			2,272	2,002
Credit revenues | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	875			596			1,645	1,132
Operating Segments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				3,585				6,771
Operating Segments | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				3,415				6,452
Operating Segments | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				170				319
Operating Segments | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				1,936				3,612
Operating Segments | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				1,936				3,612
Operating Segments | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				1,649				3,159
Operating Segments | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				1,479				2,840
Operating Segments | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				170				319
Operating Segments | Brazil
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	2,786			1,842			5,357	3,481
Operating Segments | Brazil | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				1,780				3,359
Operating Segments | Brazil | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				62				122
Operating Segments | Brazil | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,701			1,049			3,264	1,956
Operating Segments | Brazil | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				1,049				1,956
Operating Segments | Brazil | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,085			793			2,093	1,525
Operating Segments | Brazil | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				731				1,403
Operating Segments | Brazil | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				62				122
Operating Segments | Argentina
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	863			855			1,478	1,642
Operating Segments | Argentina | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				771				1,492
Operating Segments | Argentina | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				84				150
Operating Segments | Argentina | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	307			302			507	575
Operating Segments | Argentina | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				302				575
Operating Segments | Argentina | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	556			553			971	1,067
Operating Segments | Argentina | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				469				917
Operating Segments | Argentina | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				84				150
Operating Segments | Mexico
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,201			724			2,172	1,334
Operating Segments | Mexico | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				703				1,294
Operating Segments | Mexico | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				21				40
Operating Segments | Mexico | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	799			475			1,412	873
Operating Segments | Mexico | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				475				873
Operating Segments | Mexico | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	402			249			760	461
Operating Segments | Mexico | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				228				421
Operating Segments | Mexico | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				21				40
Operating Segments | Other countries
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				164				314
Operating Segments | Other countries | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				161				307
Operating Segments | Other countries | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				3				7
Operating Segments | Other countries | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				110				208
Operating Segments | Other countries | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				110				208
Operating Segments | Other countries | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				54				106
Operating Segments | Other countries | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				51				99
Operating Segments | Other countries | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				3				7
Operating Segments | Services | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				1,584				2,999
Operating Segments | Services | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				1,584				2,999
Operating Segments | Services | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				1,041				2,002
Operating Segments | Services | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				871				1,683
Operating Segments | Services | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				170				319
Operating Segments | Services | Brazil | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,411			846			2,724	1,608
Operating Segments | Services | Brazil | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				846				1,608
Operating Segments | Services | Brazil | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	609			524			1,196	1,010
Operating Segments | Services | Brazil | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				462				888
Operating Segments | Services | Brazil | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				62				122
Operating Segments | Services | Argentina | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	261			243			437	467
Operating Segments | Services | Argentina | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				243				467
Operating Segments | Services | Argentina | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	412			380			707	733
Operating Segments | Services | Argentina | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				296				583
Operating Segments | Services | Argentina | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				84				150
Operating Segments | Services | Mexico | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	686			393			1,217	731
Operating Segments | Services | Mexico | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				393				731
Operating Segments | Services | Mexico | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	138			88			261	163
Operating Segments | Services | Mexico | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				67				123
Operating Segments | Services | Mexico | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				21				40
Operating Segments | Services | Other countries | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				102				193
Operating Segments | Services | Other countries | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				102				193
Operating Segments | Services | Other countries | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				49				96
Operating Segments | Services | Other countries | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				46				89
Operating Segments | Services | Other countries | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				3				7
Operating Segments | Credit revenues | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				596				1,132
Operating Segments | Credit revenues | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				596				1,132
Operating Segments | Credit revenues | Brazil | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	469			263			885	504
Operating Segments | Credit revenues | Brazil | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				263				504
Operating Segments | Credit revenues | Argentina | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	143			172			262	331
Operating Segments | Credit revenues | Argentina | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				172				331
Operating Segments | Credit revenues | Mexico | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	$ 260			159			$ 492	294
Operating Segments | Credit revenues | Mexico | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				159				294
Operating Segments | Credit revenues | Other countries | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				2				3
Operating Segments | Credit revenues | Other countries | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				2				3
Operating Segments | Product Sales | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				352				613
Operating Segments | Product Sales | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				352				613
Operating Segments | Product Sales | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				12				25
Operating Segments | Product Sales | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				12				25
Operating Segments | Product Sales | Brazil | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				203				348
Operating Segments | Product Sales | Brazil | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				203				348
Operating Segments | Product Sales | Brazil | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				6				11
Operating Segments | Product Sales | Brazil | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				6				11
Operating Segments | Product Sales | Argentina | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				59				108
Operating Segments | Product Sales | Argentina | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				59				108
Operating Segments | Product Sales | Argentina | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				1				3
Operating Segments | Product Sales | Argentina | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				1				3
Operating Segments | Product Sales | Mexico | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				82				142
Operating Segments | Product Sales | Mexico | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				82				142
Operating Segments | Product Sales | Mexico | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				2				4
Operating Segments | Product Sales | Mexico | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				2				4
Operating Segments | Product Sales | Other countries | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				8				15
Operating Segments | Product Sales | Other countries | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				8				15
Operating Segments | Product Sales | Other countries | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				3				7
Operating Segments | Product Sales | Other countries | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income				$ 3				$ 7
[1] Recast for consistency with the current presentation due to the change in the presentation of certain financial results. Please refer to Note 2 – Summary of significant accounting policies - Change in the presentation of certain financial results and reclassification of prior year results.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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