Condensed Statements of Consolidated Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended
	Jan. 31, 2021	Oct. 31, 2020	Jul. 31, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019
Statement of Stockholders' Equity [Abstract]
Common Stock, Dividends, Per Share, Declared	$ 0.90	$ 0.90	$ 0.90	$ 0.88	$ 0.88	$ 0.88