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CASH, CASH EQUIVALENTS, RESTRICTED CASH AND CASH EQUIVALENTS AND INVESTMENTS - Components of Cash, Cash Equivalents, Restricted Cash and Cash Equivalents and Investments (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | --- | --- | ---
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Cash and cash equivalents | $ 2,582 | $ 2,635 |  |
Restricted cash and cash equivalents | 6,617 | 2,064 |  |
Total cash, cash equivalents, restricted cash and cash equivalents | 9,199 | 4,699 | $ 3,478 | $ 3,848
Total short-term investments | 3,715 | 4,485 |  |
Long-term investments | 1,336 | 1,203 |  |
Foreign deposits | 77 | 42 |  |
Brazil |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Deposited in brazilian federal government bonds | 2,128 | 3,370 |  |
Cash in bank accounts |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Cash and cash equivalents | 1,320 | 1,725 |  |
Cash in bank accounts | Brazil |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Restricted cash and cash equivalents | 4,964 | 0 |  |
Cash in bank accounts | Argentina |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Restricted cash and cash equivalents | 308 | 471 |  |
Cash in bank accounts | Mexico |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Restricted cash and cash equivalents | 19 | 149 |  |
Cash in bank accounts | Chile |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Restricted cash and cash equivalents | 222 | 130 |  |
Money market |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Cash and cash equivalents | 684 | 572 |  |
Money market | Uruguay |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Restricted cash and cash equivalents | 1 | 0 |  |
Money market (Secured lines of credit guarantee) |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Restricted cash and cash equivalents | 0 | 14 |  |
Money market (held for Meli Dólar holders) | Argentina |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Restricted cash and cash equivalents | 65 | 0 |  |
Time deposits |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Cash and cash equivalents | 578 | 334 |  |
Time deposits | Mexico |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Restricted cash and cash equivalents | 591 | 297 |  |
Time deposits | Chile |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Restricted cash and cash equivalents | 35 | 39 |  |
Time deposits | Uruguay |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Restricted cash and cash equivalents | 0 | 3 |  |
Foreign government debt securities |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Cash and cash equivalents | 0 | 4 |  |
Long-term investments | 7 | 2 |  |
Foreign government debt securities | Brazil |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Restricted cash and cash equivalents | 0 | 469 |  |
Foreign government debt securities | Uruguay |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Restricted cash and cash equivalents | 4 | 0 |  |
Securitization transactions |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Restricted cash and cash equivalents | 408 | 492 |  |
U.S. government debt securities |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Total short-term investments | 1,169 | 619 |  |
Long-term investments | 333 | 468 |  |
Foreign government debt securities |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Total short-term investments | 2,165 | 3,619 |  |
Long-term investments | 695 | 483 |  |
Foreign government debt securities | Variable Interest Entity, Primary Beneficiary |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Long-term investments | 400 | 337 |  |
Foreign government debt securities | Guarantee of line of credit | Brazil |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Total short-term investments |  | 5 |  |
Foreign government debt securities | Guarantee of line of credit | Uruguay |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Total short-term investments | 14 | 17 |  |
Time deposits |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Total short-term investments | 316 | 160 |  |
Corporate debt securities |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Total short-term investments | 65 | 87 |  |
Long-term investments | 228 | 175 |  |
Corporate debt securities | Variable Interest Entity, Primary Beneficiary |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Total short-term investments |  | 1 |  |
Securitization transactions |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Long-term investments | 8 | 12 |  |
Equity securities held at cost |  |  |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |  |  |
Long-term investments | $ 72 | $ 65 |  |

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