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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($)
7 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2018
Dec. 31, 2017
May 31, 2016
Goodwill [Line Items]        
Accumulated impairment loss $ 0 $ 0 $ 0 $ 0
Amortization expense of acquired intangibles $ 194,329,000 $ 377,685,000 $ 337,878,000 $ 113,689,000
Customer-related intangible assets        
Goodwill [Line Items]        
Intangible assets weighted average amortization periods 12 years 1 month 11 years 6 months 16 years 9 months 18 days 13 years 10 months 24 days
Acquired technologies        
Goodwill [Line Items]        
Intangible assets weighted average amortization periods   6 years 2 months 8 years 9 months 18 days 5 years
Contract-based intangible assets        
Goodwill [Line Items]        
Intangible assets weighted average amortization periods   19 years 4 months 3 years  
Trademarks and trade names        
Goodwill [Line Items]        
Intangible assets weighted average amortization periods   12 years 6 months 15 years 7 years