CASH AND CASH EQUIVALENTS, FUNDS RECEIVABLE AND CUSTOMER ACCOUNTS, AND INVESTMENTS - Schedule of Adjustments to Carrying Value of Equity Investments (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Equity Securities without Readily Determinable Fair Value [Roll Forward] | ||
| Carrying amount, beginning of period | $ 1,509 | $ 1,336 |
| Adjustments related to non-marketable equity securities: | ||
| Net additions (reductions) | (1) | 22 |
| Gross unrealized gains | 45 | 55 |
| Gross unrealized losses and impairments | (68) | 0 |
| Carrying amount, end of period | $ 1,485 | $ 1,413 |