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INVESTMENTS AND FAIR VALUE MEASUREMENT - Schedule of Crypto Assets Held in Custody (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Total user cryptocurrencies safeguarding obligation and corresponding asset $ 20,643 $ 14,708
Total user cryptocurrencies safeguarding obligation and corresponding asset 20,643 14,708
Bitcoin (BTC)    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Total user cryptocurrencies safeguarding obligation and corresponding asset 9,204 6,149
Total user cryptocurrencies safeguarding obligation and corresponding asset 9,204 6,149
Ethereum (ETH)    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Total user cryptocurrencies safeguarding obligation and corresponding asset 5,105 3,761
Total user cryptocurrencies safeguarding obligation and corresponding asset 5,105 3,761
Dogecoin (DOGE)    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Total user cryptocurrencies safeguarding obligation and corresponding asset 4,298 3,319
Total user cryptocurrencies safeguarding obligation and corresponding asset 4,298 3,319
Other    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Total user cryptocurrencies safeguarding obligation and corresponding asset 2,036 1,479
Total user cryptocurrencies safeguarding obligation and corresponding asset $ 2,036 $ 1,479