Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenues	$ 6,060.9	$ 5,709.1	$ 4,993.7
Operating expenses:
Cost of revenues	4,275.5	4,116.9	3,570.8
Selling, general and administrative expenses	849.0	832.3	744.3
Total operating expenses	5,124.5	4,949.2	4,315.0
Operating income	936.4	759.9	678.7
Interest expense, net	(135.5)	(84.7)	(55.2)
Other non-operating income (expenses), net	(6.0)	(3.0)	72.7
Total	794.9	672.2	696.2
Provision for income taxes	164.3	133.1	148.7
Net earnings	$ 630.6	$ 539.1	$ 547.5
Basic earnings per share (in dollars per share)	$ 5.36	$ 4.62	$ 4.73
Diluted earnings per share (in dollars per share)	$ 5.30	$ 4.55	$ 4.65
Weighted-average shares outstanding:
Basic (in shares)	117.7	116.7	115.7
Diluted (in shares)	119.0	118.5	117.8