Statements of Consolidated Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net earnings	$ 956.3	$ 859.4
Other comprehensive income/(losses):
Currency translation adjustments	49.2	(44.6)
Unrealized net (losses)/gains on available-for-sale securities	864.4	(150.6)
Tax effect	(197.9)	30.1
Reclassification of realized net losses on available-for-sale securities to net earnings	0.2	1.9
Tax effect	0.0	(0.4)
Unrealized loss on cash flow hedging activities	(12.5)	0.0
Tax effect	3.1	0.0
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	1.1	1.0
Tax effect	(0.3)	(0.2)
Other comprehensive (loss)/income, net of tax	708.1	(162.0)
Comprehensive income	$ 1,664.4	$ 697.4