Condensed Consolidated Statements of Stockholders’ Equity (Parenthetical) - $ / shares shares in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Treasury stock acquired (less than) (in shares)	0.4	0.1	0.4	1.1
Treasury stock reissued (in shares)	0.1	0.1	0.6	0.6
Common stock dividends (in dollars per share)	$ 0.54	$ 0.485	$ 1.62	$ 1.455