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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details)
$ in Millions
Mar. 31, 2021
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Expected annual amortization expense, remainder of 2021 $ 60.7
Expected annual amortization expense, in 2022 78.8
Expected annual amortization expense, in 2023 78.0
Expected annual amortization expense, in 2024 77.3
Expected annual amortization expense, in 2025 77.3
Expected annual amortization expense, in 2026 77.2
Expected annual amortization expense, thereafter $ 582.7