Consolidated Statement of Changes in Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Common Stock, Dividends Per Share	$ 1.64	$ 1.48	$ 1.44
$25 Par Preferred Stock [Member]
Preferred Stock, Par Value	25	25	25
Preferred Stock, Dividends Per Share	$ 1.00	$ 1.00	$ 1.00