Consolidated Statements of Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Common Stock Dividends	$ 0.52	$ 0.26
$3.50 Series Preferred Stock [Member] | EID [Member]
Preferred Stock, Dividends Per Share	3.50	3.50	$ 3.50
$4.50 Series Preferred Stock [Member] | EID [Member]
Preferred Stock, Dividends Per Share	$ 4.50	$ 4.50	$ 4.50