Reclassifications out of Accumulated Other Comprehensive Income (AOCI) (Details) - USD ($) $ in Millions		3 Months Ended
		Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		$ 6.8
AOCI Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance		(257.3)	$ (679.8)
Other comprehensive (loss)/income before reclassification adjustments		47.2	(73.3)
Tax effect		(20.8)	12.3
Reclassification adjustments to net earnings		(4.0)	1.1
Tax effect		1.0	(0.4)
Accumulated other comprehensive income, ending balance		(233.9)	(740.1)
Common Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		0.0
Currency Translation Adjustment
AOCI Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance		(269.2)	(227.0)
Other comprehensive (loss)/income before reclassification adjustments		(48.9)	(22.9)
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		(318.1)	(249.9)
Net Gains/Losses on Available-for-sale Securities
AOCI Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance		224.6	(274.0)
Other comprehensive (loss)/income before reclassification adjustments		96.1	(50.4)
Tax effect		(20.8)	12.3
Reclassification adjustments to net earnings	[1]	(2.3)	0.9
Tax effect		0.5	(0.2)
Accumulated other comprehensive income, ending balance		298.1	(311.4)
Pension Liability
AOCI Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance		(212.7)	(178.8)
Other comprehensive (loss)/income before reclassification adjustments		0.0	0.0
Tax effect		0.0	0.0
Reclassification adjustments to net earnings	[2]	(1.7)	0.2
Tax effect		0.5	(0.2)
Accumulated other comprehensive income, ending balance		(213.9)	$ (178.8)
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		0.0
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		6.8
Treasury Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		0.0
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		$ 0.0

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

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