COMMITMENTS AND CONTINGENCIES - Schedule of Allowance for Transaction Losses and Negative Customer Balances (Details) - Protection Programs - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Loss Contingency Accrual | ||||
| Beginning balance | $ 310 | $ 305 | $ 344 | $ 342 |
| Provision | 323 | 383 | 599 | 661 |
| Realized losses and charge-offs | (373) | (371) | (732) | (719) |
| Recoveries | 53 | 35 | 102 | 68 |
| Ending balance | $ 313 | $ 352 | $ 313 | $ 352 |