Total Equity and Other Comprehensive Income (Dividends per Share) (Details) - $ / shares		3 Months Ended
	May 05, 2020	Mar. 31, 2020	Mar. 31, 2019
Common Stock, par value $5.00
Class of Stock [Line Items]
Cash dividends declared, Common, per share (in dollars per share)		$ 1.15	$ 0.95
Common Stock, par value $5.00 | Subsequent Event [Member]
Class of Stock [Line Items]
Cash dividends declared, Common, per share (in dollars per share)	$ 1.15
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Cash dividends declared, Preferred, per share (in dollars per share)		0.45	0.45
Series O Preferred Stock [Member]
Class of Stock [Line Items]
Cash dividends declared, Preferred, per share (in dollars per share)		3,375	3,375
Series P Preferred Stock [Member]
Class of Stock [Line Items]
Cash dividends declared, Preferred, per share (in dollars per share)		1,531	1,531
Series Q Preferred Stock [Member]
Class of Stock [Line Items]
Cash dividends declared, Preferred, per share (in dollars per share)		$ 1,344	$ 1,344