Reclassifications out of Accumulated Other Comprehensive Income (“AOCI”) (Details) - USD ($) $ in Millions	3 Months Ended
Sep. 30, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 4,547.6	$ 3,509.1
Other comprehensive income/(loss) before reclassification adjustments	901.1	(195.2)
Tax effect	(194.8)	30.1
Reclassification adjustments to net earnings	2.4	4.0
Tax effect	(0.6)	(0.9)
Ending balance	5,348.6	3,472.8
Accumulated Other Comprehensive (Loss) /Income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(1,808.3)	(2,305.8)
Ending balance	(1,100.2)	(2,467.8)
Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(378.8)	(340.8)
Other comprehensive income/(loss) before reclassification adjustments	49.2	(44.6)
Tax effect	0.0	0.0
Reclassification adjustments to net earnings	0.0	0.0
Tax effect	0.0	0.0
Ending balance	(329.6)	(385.4)
Net Gains/Losses on Available-for-sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(1,178.0)	(1,705.6)
Other comprehensive income/(loss) before reclassification adjustments	864.4	(150.6)
Tax effect	(197.9)	30.1
Reclassification adjustments to net earnings	0.2	1.9
Tax effect	0.0	(0.4)
Ending balance	(511.3)	(1,824.6)
Cash Flow Hedging Activities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(20.0)	(23.3)
Other comprehensive income/(loss) before reclassification adjustments	(12.5)	0.0
Tax effect	3.1	0.0
Reclassification adjustments to net earnings	1.1	1.1
Tax effect	(0.3)	(0.3)
Ending balance	(28.6)	(22.5)
Pension Liability
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(231.5)	(236.1)
Other comprehensive income/(loss) before reclassification adjustments	0.0	0.0
Tax effect	0.0	0.0
Reclassification adjustments to net earnings	1.1	1.0
Tax effect	(0.3)	(0.2)
Ending balance	$ (230.7)	$ (235.3)

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Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss) before reclassification adjustment from accumulated other comprehensive income (loss).

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