Statements of Consolidated Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net earnings	$ 2,598.5	$ 2,466.5	$ 2,292.8
Other comprehensive income/(loss):
Currency translation adjustments	95.4	(53.0)	(42.2)
Unrealized net gains/(losses) on available-for-sale securities	(363.3)	602.2	642.4
Tax effect	82.6	(136.4)	(144.4)
Reclassification of net losses/(gains) on available-for-sale securities to net earnings	(11.3)	(12.9)	0.9
Tax effect	2.5	2.9	(0.3)
Unrealized (losses)/gains on cash flow hedging activities	(3.3)	(40.3)	0.0
Tax effect	0.8	10.0	0.0
Amortization of unrealized losses on cash flow hedging activities	3.8	0.0	0.0
Tax effect	(0.9)	0.0	0.0
Pension net (losses)/gains arising during the year	281.5	(160.8)	(84.7)
Tax effect	(69.0)	39.5	20.0
Reclassification of pension liability adjustment to net earnings	9.3	(11.8)	40.3
Tax effect	(2.7)	3.1	(9.5)
Other comprehensive income/(loss), net of tax	25.4	242.5	422.5
Comprehensive income	$ 2,623.9	$ 2,709.0	$ 2,715.3