EQUITY - Dividends Declared (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Class of Stock [Line Items]
Cash dividends declared per common share (in usd per share)	$ 0.17	$ 0.15	$ 0.49	$ 0.43
Series A
Class of Stock [Line Items]
Cash dividends declared per depository share (in usd per share)	328.13	0	1,049.99	0
Series B
Class of Stock [Line Items]
Cash dividends declared per depository share (in usd per share)	$ 0	$ 0	$ 0	$ 0