CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended								12 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Statement of Stockholders' Equity [Abstract]
Dividends per share declared (in dollars per share)	$ 1.16	$ 1.11	$ 1.11	$ 1.11	$ 1.11	$ 1.06	$ 1.06	$ 1.06	$ 4.49	$ 4.29	$ 3.94	$ 3.60	$ 3.24