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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Reclassifications of Previously Reported Segment Information (Details) - USD ($) $ in Millions	3 Months Ended						12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023		Dec. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	$ 4,333	$ 4,409	$ 3,927	$ 3,585	$ 3,186	[1]	$ 15,107
As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					3,037
Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					149
Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	2,496				1,676
Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,837				1,510
Services | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	2,128				1,415
Services | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,057				961
Credit Revenues | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	770				536
Operating Segments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					3,186
Operating Segments | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					3,037
Operating Segments | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					149
Operating Segments | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					1,676
Operating Segments | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					1,676
Operating Segments | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					1,510
Operating Segments | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					1,361
Operating Segments | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					149
Operating Segments | Brazil
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	2,571				1,639
Operating Segments | Brazil | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					1,579
Operating Segments | Brazil | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					60
Operating Segments | Brazil | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,563				907
Operating Segments | Brazil | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					907
Operating Segments | Brazil | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,008				732
Operating Segments | Brazil | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					672
Operating Segments | Brazil | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					60
Operating Segments | Argentina
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	615				787
Operating Segments | Argentina | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					721
Operating Segments | Argentina | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					66
Operating Segments | Argentina | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	200				273
Operating Segments | Argentina | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					273
Operating Segments | Argentina | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	415				514
Operating Segments | Argentina | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					448
Operating Segments | Argentina | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					66
Operating Segments | Mexico
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	971				610
Operating Segments | Mexico | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					591
Operating Segments | Mexico | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					19
Operating Segments | Mexico | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	613				398
Operating Segments | Mexico | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					398
Operating Segments | Mexico | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	358				212
Operating Segments | Mexico | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					193
Operating Segments | Mexico | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					19
Operating Segments | Other countries
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					150
Operating Segments | Other countries | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					146
Operating Segments | Other countries | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					4
Operating Segments | Other countries | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					98
Operating Segments | Other countries | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					98
Operating Segments | Other countries | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					52
Operating Segments | Other countries | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					48
Operating Segments | Other countries | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					4
Operating Segments | Services | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					1,415
Operating Segments | Services | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					1,415
Operating Segments | Services | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					961
Operating Segments | Services | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					812
Operating Segments | Services | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					149
Operating Segments | Services | Brazil | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	1,313				762
Operating Segments | Services | Brazil | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					762
Operating Segments | Services | Brazil | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	587				486
Operating Segments | Services | Brazil | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					426
Operating Segments | Services | Brazil | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					60
Operating Segments | Services | Argentina | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	176				224
Operating Segments | Services | Argentina | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					224
Operating Segments | Services | Argentina | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	295				353
Operating Segments | Services | Argentina | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					287
Operating Segments | Services | Argentina | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					66
Operating Segments | Services | Mexico | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	531				338
Operating Segments | Services | Mexico | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					338
Operating Segments | Services | Mexico | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	123				75
Operating Segments | Services | Mexico | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					56
Operating Segments | Services | Mexico | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					19
Operating Segments | Services | Other countries | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					91
Operating Segments | Services | Other countries | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					91
Operating Segments | Services | Other countries | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					47
Operating Segments | Services | Other countries | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					43
Operating Segments | Services | Other countries | Fintech | Reclassification
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					4
Operating Segments | Product Sales | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					261
Operating Segments | Product Sales | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					261
Operating Segments | Product Sales | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					13
Operating Segments | Product Sales | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					13
Operating Segments | Product Sales | Brazil | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					145
Operating Segments | Product Sales | Brazil | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					145
Operating Segments | Product Sales | Brazil | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					5
Operating Segments | Product Sales | Brazil | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					5
Operating Segments | Product Sales | Argentina | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					49
Operating Segments | Product Sales | Argentina | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					49
Operating Segments | Product Sales | Argentina | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					2
Operating Segments | Product Sales | Argentina | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					2
Operating Segments | Product Sales | Mexico | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					60
Operating Segments | Product Sales | Mexico | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					60
Operating Segments | Product Sales | Mexico | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					2
Operating Segments | Product Sales | Mexico | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					2
Operating Segments | Product Sales | Other countries | Commerce
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					7
Operating Segments | Product Sales | Other countries | Commerce | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					7
Operating Segments | Product Sales | Other countries | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					4
Operating Segments | Product Sales | Other countries | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					4
Operating Segments | Credit Revenues | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					536
Operating Segments | Credit Revenues | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					536
Operating Segments | Credit Revenues | Brazil | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	416				241
Operating Segments | Credit Revenues | Brazil | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					241
Operating Segments | Credit Revenues | Argentina | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	119				159
Operating Segments | Credit Revenues | Argentina | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					159
Operating Segments | Credit Revenues | Mexico | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income	$ 232				135
Operating Segments | Credit Revenues | Mexico | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					135
Operating Segments | Credit Revenues | Other countries | Fintech
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					1
Operating Segments | Credit Revenues | Other countries | Fintech | As reported
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues and financial income					$ 1
[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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