INVESTMENTS AND FAIR VALUE MEASUREMENT - Summary of Crypto Assets Held in Custody (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Total user cryptocurrencies safeguarding obligation and corresponding asset	$ 10,183	$ 8,431
Total user cryptocurrencies safeguarding obligation and corresponding asset	10,183	8,431
Bitcoin (BTC)
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Total user cryptocurrencies safeguarding obligation and corresponding asset	3,858	2,327
Total user cryptocurrencies safeguarding obligation and corresponding asset	3,858	2,327
Ethereum (ETH)
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Total user cryptocurrencies safeguarding obligation and corresponding asset	2,870	2,341
Total user cryptocurrencies safeguarding obligation and corresponding asset	2,870	2,341
Dogecoin (DOGE)
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Total user cryptocurrencies safeguarding obligation and corresponding asset	2,405	2,802
Total user cryptocurrencies safeguarding obligation and corresponding asset	2,405	2,802
Other
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Total user cryptocurrencies safeguarding obligation and corresponding asset	1,050	961
Total user cryptocurrencies safeguarding obligation and corresponding asset	$ 1,050	$ 961