EARNINGS PER SHARE - Antidilutive and Contingently Issuable Shares (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Antdilutive securities, entity in net loss position
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Antidilutive awards excluded from diluted EPS (in shares)	6.8	4.0
Convertible Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Antidilutive awards excluded from diluted EPS (in shares)	59.9
Convertible Debt Securities
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Antidilutive awards excluded from diluted EPS (in shares)	2.4