Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Dividends paid per share (in dollars per share)	$ 2.240	$ 2.130
Common stock
Dividends paid per share (in dollars per share)	2.240	2.130	$ 2.030
Class B stock
Dividends paid per share (in dollars per share)	2.240	2.130	$ 2.030
Series A Preferred Stock
Preferred dividends paid per share (in dollars per share)	$ 85.94	$ 35.18