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REVENUES - Changes in Contract Assets (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
Change in Contract with Customer  
Contract Assets, January 1, 2021 $ 35.3
Changes related to revenue recognition during the period 22.3
Amounts invoiced during the period (20.1)
Contract Assets, December 31, 2021 $ 37.5