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ACCOUNTS RECEIVABLE, NET (Tables)
 12 Months Ended
Dec. 31, 2020
Receivables [Abstract]  
Accounts receivable ACCOUNTS RECEIVABLE
December 31, 2020December 31,
2019
Dx accounts receivable$1,515.5 $798.1 
DD accounts receivable986.4 764.8 
Less DD allowance for doubtful accounts(22.1)(19.0)
Accounts receivable$2,479.8 $1,543.9