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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Crypto Asset Activity (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Crypto Asset [Roll Forward]    
Balance at beginning of year   $ 9
Gains included in net income $ 14  
Balance at end of year $ 24 0
Cumulative Effect, Period of Adoption, Adjustment    
Crypto Asset [Roll Forward]    
Balance at end of year   $ 1