Statements of Consolidated Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net earnings	$ 647.5	$ 651.6	$ 1,249.6	$ 1,234.0
Other comprehensive income/(loss):
Currency translation adjustments	61.9	34.3	112.3	(14.6)
Unrealized net (losses)/gains on available-for-sale securities	(44.1)	(35.5)	(68.7)	60.6
Tax effect	10.0	7.5	15.5	(13.3)
Reclassification of net (gains)/losses on available-for-sale securities to net earnings	(7.7)	(7.1)	(8.0)	(9.4)
Tax effect	1.7	1.6	1.8	2.1
Unrealized (losses)/gains on cash flow hedging activities	0.0	0.7	(3.3)	0.7
Tax effect	0.0	(0.2)	0.8	(0.2)
Amortization of unrealized losses on cash flow hedging activities	1.1	0.0	1.7	0.0
Tax effect	(0.4)	0.0	(0.4)	0.0
Reclassification of pension liability adjustment to net earnings	2.5	1.9	5.0	0.2
Tax effect	(0.6)	(0.5)	(1.6)	0.0
Other comprehensive income, net of tax	24.4	2.7	55.1	26.1
Comprehensive income	$ 671.9	$ 654.3	$ 1,304.7	$ 1,260.1