Reclassifications out of Accumulated Other Comprehensive Income (AOCI) (Details) - USD ($) $ in Millions		3 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
AOCI Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance		$ (14.8)	$ (257.3)
Other comprehensive (loss)/income before reclassification adjustments		22.5	47.2
Tax effect		6.3	(20.8)
Reclassification adjustments to net earnings		2.8	(4.0)
Tax effect		(0.9)	1.0
Accumulated other comprehensive income, ending balance		15.9	(233.9)
Currency Translation Adjustment
AOCI Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance		(322.2)	(269.2)
Other comprehensive (loss)/income before reclassification adjustments		50.4	(48.9)
Tax effect		0.0	0.0
Reclassification adjustments to net earnings		0.0	0.0
Tax effect		0.0	0.0
Accumulated other comprehensive income, ending balance		(271.8)	(318.1)
Net Gains/Losses on Available-for-sale Securities
AOCI Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance		680.4	224.6
Other comprehensive (loss)/income before reclassification adjustments		(24.6)	96.1
Tax effect		5.5	(20.8)
Reclassification adjustments to net earnings	[1]	(0.3)	(2.3)
Tax effect		0.1	0.5
Accumulated other comprehensive income, ending balance		661.1	298.1
Cash Flow Hedging Activities
AOCI Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance		(30.3)
Other comprehensive (loss)/income before reclassification adjustments		(3.3)
Tax effect		0.8
Reclassification adjustments to net earnings	[2]	0.6
Tax effect		0.0
Accumulated other comprehensive income, ending balance		(32.2)
Pension Liability
AOCI Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance		(342.7)	(212.7)
Other comprehensive (loss)/income before reclassification adjustments		0.0	0.0
Tax effect		0.0	0.0
Reclassification adjustments to net earnings	[3]	2.5	(1.7)
Tax effect		(1.0)	0.5
Accumulated other comprehensive income, ending balance		$ (341.2)	$ (213.9)

[1] (A) Reclassification adjustments out of AOCI are included within Other (income)/expense, net, on the Statements of Consolidated Earnings.

[2] (C) Reclassification adjustments out of AOCI are included in Interest expense on the Statements of Consolidated Earnings.

[3] (B) Reclassification adjustments out of AOCI are included in net pension income (see Note 11).