CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Common stock, per share (in usd per share)	$ 1.08	$ 0.94	$ 0.74
Preferred stock, Series H
Preferred stock, per share (in usd per share)	1,275.00	1,275.00	1,275.00
Preferred stock Series I
Preferred stock, per share (in usd per share)	1,656.24	1,656.24	1,656.24
Preferred stock, Series J
Preferred stock, per share (in usd per share)	1,043.48	1,559.42	$ 1,225.00
Preferred Stock Series K
Preferred stock, per share (in usd per share)	1,237.52	357.50
Preferred stock, Series L
Preferred stock, per share (in usd per share)	468.75
Class B Preferred stock, Series A
Preferred stock, per share (in usd per share)	$ 60.00	20.83
Other
Preferred stock, per share (in usd per share)		$ 30.00