OTHER CURRENT ASSETS - MARKETABLE SECURITIES AND OTHER SHORT-TERM INVESTMENTS (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2021 |
Jun. 30, 2020 |
Jun. 30, 2021 |
Jun. 30, 2020 |
Dec. 31, 2020 |
|
| Net Investment Income [Line Items] | |||||
| Marketable securities and other short-term investments | $ 437 | $ 437 | $ 346 | ||
| Marketable securities at fair value | 436 | 436 | 343 | ||
| Unrealized gains | 16 | $ 21 | 22 | $ 12 | |
| Foreign government securities | |||||
| Net Investment Income [Line Items] | |||||
| Marketable securities and other short-term investments | 279 | 279 | 207 | ||
| Corporate debt securities | |||||
| Net Investment Income [Line Items] | |||||
| Marketable securities and other short-term investments | 157 | 157 | 136 | ||
| Other | |||||
| Net Investment Income [Line Items] | |||||
| Marketable securities and other short-term investments | $ 1 | $ 1 | $ 3 | ||