Statements of Consolidated Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,249.5	$ 1,184.9	$ 3,169.0	$ 2,922.7
Other comprehensive income/(loss):
Currency translation adjustments	45.3	(37.4)	(6.5)	(28.1)
Unrealized net gains/(losses) on available-for-sale securities	386.2	(91.0)	826.9	618.8
Tax effect	(87.5)	19.1	(191.2)	(145.7)
Reclassification of realized net losses on available-for-sale securities to net earnings	0.1	1.2	0.8	5.2
Tax effect	0.0	(0.2)	(0.1)	(1.1)
Unrealized loss on cash flow hedging activities	(4.7)	0.0	(17.2)	0.0
Tax effect	1.2	0.0	4.3	0.0
Amortization of unrealized losses on cash flow hedging activities	1.4	1.1	4.0	3.3
Tax effect	(0.3)	(0.3)	(1.0)	(0.8)
Reclassification of pension liability adjustment to net earnings	1.2	1.0	3.0	2.9
Tax effect	(0.2)	(0.2)	(0.7)	(0.6)
Other comprehensive income/(loss), net of tax	342.7	(106.7)	622.3	453.9
Comprehensive income	$ 1,592.2	$ 1,078.2	$ 3,791.3	$ 3,376.6