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REVENUE RECOGNITION - Remaining Performance Obligations (Details) - USD ($)
$ in Billions
Mar. 31, 2020
Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Revenue, remaining performance obligation, amount $ 5.1 $ 4.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Revenue, remaining performance obligation, percentage 66.00%  
Revenue, remaining performance obligation, period 12 months