SHAREHOLDERS' EQUITY (Dividends) (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Class of Stock [Line Items]
Cash dividends declared per common share (in usd per share)	$ 0.40	$ 0.39	$ 1.20	$ 1.17
Series D Preferred Shares
Class of Stock [Line Items]
Cash dividends declared per preferred share (in usd per share)	0.34375	0.34375	1.03125	1.03125
Series E Preferred Shares
Class of Stock [Line Items]
Cash dividends declared per preferred share (in usd per share)	$ 34.375	$ 34.375	$ 103.125	$ 103.125