Quarterly Financial Results (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended												12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Summarized Quarterly Results of Continuing Operations [Abstract]
Cost of Goods and Services Sold	$ 2,067.2	$ 2,239.1	$ 2,094.1	$ 2,044.8	$ 2,001.1	[1]	$ 2,092.6	[1]	$ 2,000.2	[1]	$ 1,927.6	[1]	$ 8,445.1	$ 8,021.6	$ 7,757.4
Revenues	3,376.8	4,047.8	3,669.5	3,495.7	3,479.3	[1]	3,828.2	[1]	3,492.4	[1]	3,310.3	[1]	14,589.8	14,110.2	13,274.2
Gross profit	1,309.6	1,808.7	1,575.4	1,450.9	1,478.2		1,735.6		1,492.2		1,382.7
Earnings before income taxes	531.3	1,076.7	835.5	739.1	633.3		984.5		741.0		646.8		3,182.6	3,005.6	2,282.6
Net earnings	$ 411.5	$ 820.9	$ 651.6	$ 582.4	$ 475.5		$ 753.7		$ 558.2		$ 505.4		$ 2,466.5	$ 2,292.8	$ 1,884.9
Basic earnings per share (in dollars per share)	$ 0.96	$ 1.91	$ 1.51	$ 1.35	$ 1.10		$ 1.74		$ 1.28		$ 1.16		$ 5.73	$ 5.27	$ 4.28
Diluted earnings per share (in dollars per share)	$ 0.96	$ 1.90	$ 1.50	$ 1.34	$ 1.09		$ 1.73		$ 1.27		$ 1.15		$ 5.70	$ 5.24	$ 4.25
PEO Revision Adjustment					$ 19.4		$ 19.2		$ 13.5		$ 12.9

[1] (A) The prior period amounts presented have been revised to correct the amounts previously reported on a gross basis to a net basis by reducing PEO revenues and operating expenses for associated costs of an equal amount of $12.9 million, $13.5 million, $19.2 million and $19.4 million for the first quarter, second quarter, third quarter and fourth quarter, respectively. Refer to Note 1 to our consolidated financial statements for more information on this revision.