FUNDS RECEIVABLE AND CUSTOMER ACCOUNTS AND INVESTMENTS - Measurement Alternative Adjustments (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2022 |
Sep. 30, 2021 |
Sep. 30, 2022 |
Sep. 30, 2021 |
|
| Equity Securities without Readily Determinable Fair Value [Roll Forward] | ||||
| Carrying amount, beginning of period | $ 1,574 | $ 1,009 | $ 1,268 | $ 779 |
| Adjustments related to non-marketable equity securities: | ||||
| Net additions (sales) | 17 | 97 | 74 | 110 |
| Gross unrealized gains | 174 | 90 | 423 | 307 |
| Carrying amount, end of period | $ 1,765 | $ 1,196 | $ 1,765 | $ 1,196 |