Quarterly Financial Results (Unaudited) - Summary of Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Millions	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
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 1,531.6	$ 1,389.8	$ 1,054.9	$ 1,017.4	$ 1,361.9	$ 1,249.9	$ 968.7	$ 948.6	$ 4,993.7	$ 4,529.0	$ 4,362.2
Gross profit	514.9	429.2	248.5	230.3	477.7	377.4	187.7	221.1	1,423.0	1,263.9
Operating income	281.4	239.2	79.5	78.6	298.8	226.3	26.8	73.1	678.7	624.9	652.7
Earnings before income taxes	336.4	216.9	69.4	73.6	294.8	210.5	10.5	63.8	696.2	579.5	607.3
Net earnings	$ 260.4	$ 165.0	$ 56.3	$ 65.8	$ 229.7	$ 166.8	$ 10.1	$ 55.9	$ 547.5	$ 462.5	$ 482.1
Basic EPS (in dollars per share)	$ 2.24	$ 1.42	$ 0.49	$ 0.57	$ 2.00	$ 1.46	$ 0.09	$ 0.49	$ 4.73	$ 4.03	$ 4.16
Diluted EPS (in dollars per share)	$ 2.20	$ 1.40	$ 0.48	$ 0.56	$ 1.97	$ 1.43	$ 0.09	$ 0.48	$ 4.65	$ 3.95	$ 4.06