SHAREHOLDERS' EQUITY (Dividends) (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Class of Stock [Line Items]
Cash dividends declared per common share (in usd per share)	$ 0.42	$ 0.41	$ 0.84	$ 0.82
Dividends paid in period of declaration (in usd per share)	0	0	0.42	0.41
Dividends paid in period following declaration (in usd per share)	0.42	0.41	0.42	0.41
Series E preferred shares
Class of Stock [Line Items]
Cash dividends declared per preferred share (in usd per share)	34.38	34.38	68.75	68.75
Dividends paid in period of declaration (in usd per share)	0	0	34.38	34.38
Dividends paid in period following declaration (in usd per share)	$ 34.38	$ 34.38	$ 34.38	$ 34.38