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DEFERRED REVENUE AND PERFORMANCE OBLIGATIONS - Narrative (Details)
$ in Millions
Dec. 31, 2020
USD ($)
Revenue from Contract with Customer [Abstract]  
Remaining performance obligations $ 1,590
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction  
Revenue, remaining performance obligation, percentage 49.00%
Expected timing of satisfaction period 12 months