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DISCONTINUED OPERATIONS AND OTHER DIVESTITURES - Supplemental Cash Flow Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Non-cash operating items:      
Depreciation and amortization $ 0.0 $ 3.3 $ 14.4
Gain (loss) on disposition of discontinued operations – net of tax 19.2 (0.1) (2.4)
Deferred taxes 0.1 (1.4) (0.2)
Impairments 0.1 82.1 6.6
Capital expenditures $ 0.0 $ (3.4) $ (12.8)