Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2021	Jun. 30, 2018
Common stock
Common stock, par value per share (in dollars per share)	$ 1	$ 1	$ 1	$ 1
Dividends paid per share (in dollars per share)	1.745	2.240
Class B stock
Common stock, par value per share (in dollars per share)	1	1	$ 1	$ 1
Dividends paid per share (in dollars per share)	1.745	2.240
Series A Preferred Stock
Preferred dividends paid per share (in dollars per share)	$ 86.89	$ 85.94