Statements of Consolidated Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net earnings	$ 878.4	$ 813.1	$ 1,737.8	$ 1,592.2
Other comprehensive income/(losses):
Currency translation adjustments	53.9	71.1	9.3	(13.6)
Unrealized net gains/(losses) on available-for-sale securities	860.5	242.2	709.9	(592.9)
Tax effect	(194.9)	(51.2)	(164.8)	134.5
Reclassification of realized net losses/(gains) on available-for-sale securities to net earnings	2.0	11.5	4.0	13.0
Tax effect	(0.5)	(2.7)	(1.0)	(2.9)
Amortization of unrealized losses on cash flow hedging activities	1.1	1.1	2.2	2.2
Tax effect	(0.2)	(0.2)	(0.5)	(0.5)
Reclassification of pension liability adjustment to net earnings	0.9	1.5	1.9	3.6
Tax effect	(0.2)	(0.1)	(0.4)	(0.6)
Other comprehensive income/(loss), net of tax	722.6	273.2	560.6	(457.2)
Comprehensive income	$ 1,601.0	$ 1,086.3	$ 2,298.4	$ 1,135.0