Statements of Consolidated Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net earnings	$ 859.4	$ 779.0
Other comprehensive (loss)/income:
Currency translation adjustments	(44.6)	(84.7)
Unrealized net (losses)/gains on available-for-sale securities	(150.6)	(835.1)
Tax effect	30.1	185.8
Reclassification of realized net losses/(gains) on available-for-sale securities to net earnings	1.9	1.5
Tax effect	(0.4)	(0.3)
Amortization of unrealized losses on cash flow hedging activities	1.1	1.1
Tax effect	(0.3)	(0.3)
Reclassification of pension liability adjustment to net earnings	1.0	2.1
Tax effect	(0.2)	(0.5)
Other comprehensive (loss)/income, net of tax	(162.0)	(730.4)
Comprehensive income	$ 697.4	$ 48.6