STOCKHOLDERS' EQUITY - Capital Stock (Details) - At-The-Market Equity Offering Program - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	9 Months Ended
	Oct. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Equity offering [Line Items]
Common stock authorized under equity offering program			$ 1,000.0
Stock issued during period, shares, new issues, equity offering program		0.8
Shares Issued, Price Per Share		$ 45.07
Equity offering program, remaining authorized offering amount		$ 785.0
Subsequent Event
Equity offering [Line Items]
Stock issued during period, shares, new issues, equity offering program	0.7
Shares Issued, Price Per Share	$ 44.65