FINANCING ARRANGEMENTS - Note Hedges and Warrants (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended	12 Months Ended
	May 09, 2016	Jun. 30, 2016	Dec. 31, 2019	Dec. 31, 2017	Sep. 30, 2018	Apr. 04, 2016
Debt Disclosure [Abstract]
Derivative, Cost of Hedge		$ 59.1
Number of shares available to be purchased (in shares)	46.3
Strike price (in usd per share)	$ 5.40
Proceeds from issuance of warrants				$ 35.5
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants			46.3
Exercise price (in usd per share)						$ 8.50
Line of Credit Facility, Maximum Borrowing Capacity					$ 250.0