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INCOME TAXES - Narrative (Details) - USD ($)
 2 Months Ended 12 Months Ended
Dec. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Operating Loss Carryforwards [Line Items]      
Liability recorded for unrecognized tax benefits $ 0    
Reversal of more-likely-than-not basis   $ 76,000,000  
Reversal or re-evaluated tax return filing     $ 25,000,000
Federal      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforwards 17,000,000 17,000,000  
Tax credit carryforwards   855,000,000  
State and Local Jurisdiction | CALIFORNIA      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforwards $ 2,000,000,000 $ 2,000,000,000