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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
	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023		Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2023	Sep. 30, 2024	Sep. 30, 2023		Dec. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	$ 5,312	$ 4,409	$ 3,927	[1]	$ 3,585	$ 3,186	$ 6,771	$ 14,718	$ 10,698	[1]	$ 15,107
As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			3,760						10,212
Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			167						486
Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	3,139		2,128					8,605	5,740
Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	2,173		1,799					6,113	4,958
Services | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	2,601		1,796					7,231	4,795
Services | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,249		1,118					3,521	3,120
Credit revenues | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	910		672					2,555	1,804
Operating Segments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			3,927						10,698
Operating Segments | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			3,760						10,212
Operating Segments | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			167						486
Operating Segments | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			2,128						5,740
Operating Segments | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			2,128						5,740
Operating Segments | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			1,799						4,958
Operating Segments | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			1,632						4,472
Operating Segments | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			167						486
Operating Segments | Brazil
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	2,913		2,063					8,270	5,544
Operating Segments | Brazil | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			2,006						5,365
Operating Segments | Brazil | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			57						179
Operating Segments | Brazil | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,809		1,211					5,073	3,167
Operating Segments | Brazil | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			1,211						3,167
Operating Segments | Brazil | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,104		852					3,197	2,377
Operating Segments | Brazil | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			795						2,198
Operating Segments | Brazil | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			57						179
Operating Segments | Mexico
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,145		795					3,317	2,129
Operating Segments | Mexico | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			772						2,066
Operating Segments | Mexico | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			23						63
Operating Segments | Mexico | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	758		499					2,170	1,372
Operating Segments | Mexico | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			499						1,372
Operating Segments | Mexico | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	387		296					1,147	757
Operating Segments | Mexico | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			273						694
Operating Segments | Mexico | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			23						63
Operating Segments | Argentina
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,033		910					2,511	2,552
Operating Segments | Argentina | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			825						2,317
Operating Segments | Argentina | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			85						235
Operating Segments | Argentina | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	411		310					918	885
Operating Segments | Argentina | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			310						885
Operating Segments | Argentina | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	622		600					1,593	1,667
Operating Segments | Argentina | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			515						1,432
Operating Segments | Argentina | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			85						235
Operating Segments | Other countries
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			159						473
Operating Segments | Other countries | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			157						464
Operating Segments | Other countries | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			2						9
Operating Segments | Other countries | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			108						316
Operating Segments | Other countries | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			108						316
Operating Segments | Other countries | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			51						157
Operating Segments | Other countries | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			49						148
Operating Segments | Other countries | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			2						9
Operating Segments | Services | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			1,796						4,795
Operating Segments | Services | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			1,796						4,795
Operating Segments | Services | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			1,118						3,120
Operating Segments | Services | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			951						2,634
Operating Segments | Services | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			167						486
Operating Segments | Services | Brazil | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,452		1,007					4,176	2,615
Operating Segments | Services | Brazil | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			1,007						2,615
Operating Segments | Services | Brazil | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	597		544					1,793	1,554
Operating Segments | Services | Brazil | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			487						1,375
Operating Segments | Services | Brazil | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			57						179
Operating Segments | Services | Mexico | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	647		429					1,864	1,160
Operating Segments | Services | Mexico | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			429						1,160
Operating Segments | Services | Mexico | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	137		98					398	261
Operating Segments | Services | Mexico | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			75						198
Operating Segments | Services | Mexico | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			23						63
Operating Segments | Services | Argentina | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	358		260					795	727
Operating Segments | Services | Argentina | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			260						727
Operating Segments | Services | Argentina | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	458		429					1,165	1,162
Operating Segments | Services | Argentina | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			344						927
Operating Segments | Services | Argentina | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			85						235
Operating Segments | Services | Other countries | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			100						293
Operating Segments | Services | Other countries | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			100						293
Operating Segments | Services | Other countries | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			47						143
Operating Segments | Services | Other countries | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			45						134
Operating Segments | Services | Other countries | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			2						9
Operating Segments | Credit revenues | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			672						1,804
Operating Segments | Credit revenues | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			672						1,804
Operating Segments | Credit revenues | Brazil | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	499		304					1,384	808
Operating Segments | Credit revenues | Brazil | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			304						808
Operating Segments | Credit revenues | Mexico | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	246		195					738	489
Operating Segments | Credit revenues | Mexico | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			195						489
Operating Segments | Credit revenues | Argentina | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	$ 163		171					$ 425	502
Operating Segments | Credit revenues | Argentina | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			171						502
Operating Segments | Credit revenues | Other countries | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			2						5
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						5
Operating Segments | Product Sales | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			332						945
Operating Segments | Product Sales | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			332						945
Operating Segments | Product Sales | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			9						34
Operating Segments | Product Sales | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			9						34
Operating Segments | Product Sales | Brazil | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			204						552
Operating Segments | Product Sales | Brazil | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			204						552
Operating Segments | Product Sales | Brazil | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			4						15
Operating Segments | Product Sales | Brazil | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			4						15
Operating Segments | Product Sales | Mexico | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			70						212
Operating Segments | Product Sales | Mexico | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			70						212
Operating Segments | Product Sales | Mexico | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			3						7
Operating Segments | Product Sales | Mexico | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			3						7
Operating Segments | Product Sales | Argentina | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			50						158
Operating Segments | Product Sales | Argentina | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			50						158
Operating Segments | Product Sales | Argentina | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			0						3
Operating Segments | Product Sales | Argentina | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			0						3
Operating Segments | Product Sales | Other countries | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			8						23
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						23
Operating Segments | Product Sales | Other countries | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			2						9
Operating Segments | Product Sales | Other countries | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income			$ 2						$ 9
[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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