Amount of allowance for credit loss on accounts receivable.

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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amount of increase (decrease) in allowance for credit loss on accounts receivable.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of direct write-downs of accounts receivable charged against the allowance.

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CREDIT LOSSES (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
CREDIT LOSSES (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at end of period		$ 1.7	$ 6.8
Current period provision		1.2
Trade Accounts Receivable
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Writeoff		0.7
Notes and Other Receivables
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Writeoff	$ 5.6	$ 5.6