Statements of Consolidated Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 651.6	$ 558.2	$ 1,234.0	$ 1,063.6
Other comprehensive income/(loss):
Currency translation adjustments	34.3	(24.7)	(14.6)	(47.6)
Unrealized net gains/(losses) on available-for-sale securities	(35.5)	168.3	60.6	118.0
Tax effect	7.5	(38.8)	(13.3)	(26.6)
Reclassification of net (gain)/losses on available-for-sale securities to net earnings	(7.1)	0.5	(9.4)	1.4
Tax effect	1.6	(0.1)	2.1	(0.3)
Reclassification of pension liability adjustment to net earnings	1.9	26.2	0.2	26.3
Tax effect	(0.5)	(6.3)	0.0	(6.4)
Other	0.7	0.0	0.7	0.0
Tax effect	(0.2)	0.0	(0.2)	0.0
Other comprehensive income, net of tax	2.7	125.1	26.1	64.8
Comprehensive income	$ 654.3	$ 683.3	$ 1,260.1	$ 1,128.4