Condensed Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenues	$ 1,431.1	$ 1,283.3
Operating expenses:
Cost of revenues	1,075.3	990.4
Selling, general and administrative expenses	207.3	205.3
Total operating expenses	1,282.6	1,195.7
Operating income	148.4	87.5
Interest expense, net	(33.4)	(26.9)
Other non-operating expenses, net	(2.1)	(5.2)
Earnings before income taxes	112.9	55.4
Provision for income taxes	22.0	5.0
Net earnings	$ 90.9	$ 50.4
Basic earnings per share (in dollars per share)	$ 0.77	$ 0.43
Diluted earnings per share (in dollars per share)	$ 0.76	$ 0.42
Weighted-average shares outstanding:
Basic (in shares)	117.9	117.5
Diluted (in shares)	119.2	118.9