Reclassifications out of Accumulated Other Comprehensive Income (AOCI) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
AOCI Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance		$ (615.0)	$ (428.2)	$ (679.8)	$ (383.2)
Other comprehensive (loss)/income before reclassification adjustments		256.7	(213.6)	327.1	(318.8)
Tax effect		(58.0)	53.4	(84.8)	109.9
Reclassification adjustments to net earnings		6.0	2.5	33.9	8.2
Tax effect		(1.6)	(0.5)	(8.3)	(2.5)
Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings, Tax Effect	[1]		(42.3)		(42.3)
Accumulated other comprehensive income, ending balance		(411.9)	(628.7)	(411.9)	(628.7)
Currency Translation Adjustment
AOCI Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance		(274.6)	(179.8)	(227.0)	(234.8)
Other comprehensive (loss)/income before reclassification adjustments		(2.3)	26.8	(49.9)	81.8
Tax effect		0.0	0.0	0.0	0.0
Reclassification adjustments to net earnings		0.0	0.0	0.0	0.0
Tax effect		0.0	0.0	0.0	0.0
Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings, Tax Effect	[1]		0.0		0.0
Accumulated other comprehensive income, ending balance		(276.9)	(153.0)	(276.9)	(153.0)
Net Gains/Losses on Available-for-sale Securities
AOCI Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance		(181.5)	(34.6)	(274.0)	68.3
Other comprehensive (loss)/income before reclassification adjustments		259.0	(240.4)	377.0	(400.6)
Tax effect		(58.0)	53.4	(84.8)	109.9
Reclassification adjustments to net earnings	[2]	(0.1)	0.2	1.4	1.3
Tax effect		0.0	0.1	(0.2)	(0.2)
Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings, Tax Effect	[1]		(7.1)		(7.1)
Accumulated other comprehensive income, ending balance		19.4	(228.4)	19.4	(228.4)
Pension Liability
AOCI Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance		(158.9)	(213.8)	(178.8)	(216.7)
Other comprehensive (loss)/income before reclassification adjustments		0.0	0.0	0.0	0.0
Tax effect		0.0	0.0	0.0	0.0
Reclassification adjustments to net earnings	[3]	6.1	2.3	32.5	6.9
Tax effect		(1.6)	(0.6)	(8.1)	(2.3)
Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings, Tax Effect	[1]		(35.2)		(35.2)
Accumulated other comprehensive income, ending balance		$ (154.4)	$ (247.3)	$ (154.4)	$ (247.3)

[1] (C) During the quarter ended March 31, 2018, the Company adopted ASU 2018-02 and reclassified stranded tax effects attributable to the Act from AOCI to retained earnings. The March 31, 2018 Consolidated Balance Sheets reflect the reclassification out of accumulated other comprehensive income into retained earnings (see Note 2).

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

[3] (B) Reclassification adjustments out of AOCI are included in net pension expense (see Note 12).(C) During the quarter ended March 31, 2018, the Company adopted ASU 2018-02 and reclassified stranded tax effects attributable to the Act from AOCI to retained earnings. The March 31, 2018 Consolidated Balance Sheets reflect the reclassification out of accumulated other comprehensive income into retained earnings (see Note 2).