INVESTMENTS AND FAIR VALUE MEASUREMENT - SUMMARY OF CRYPTO ASSETS HELD IN CUSTODY (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Total user cryptocurrencies safeguarding obligation and corresponding asset	$ 9,361	$ 0	$ 0
Ethereum (ETH)
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Total user cryptocurrencies safeguarding obligation and corresponding asset	2,783
Bitcoin (BTC)
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Total user cryptocurrencies safeguarding obligation and corresponding asset	2,759
Dogecoin (DOGE)
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Total user cryptocurrencies safeguarding obligation and corresponding asset	2,603
Other
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Total user cryptocurrencies safeguarding obligation and corresponding asset	$ 1,216