Other (Income)/Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Other Income and Expenses [Abstract]
Interest income on corporate funds	$ (4.7)	$ (12.1)	$ (28.9)	$ (70.1)
Realized (gains) / losses on available-for-sale securities, net	0.4	(2.5)	(7.6)	(11.9)
Impairment of assets	2.6	0.0	7.6	0.0
Gain on sale of assets	(1.6)	0.0	(3.4)	(2.1)
Non-service components of pension income, net	(15.5)	(30.0)	(40.4)	(61.1)
Other (income)/expense, net	$ (18.8)	$ (44.6)	$ (72.7)	$ (145.2)

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

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Amount of expense (reversal of expense) for net periodic benefit cost components, excluding service cost component, of defined benefit plan. Amount includes, but is not limited to, interest cost, expected (return) loss on plan asset, amortization of prior service cost (credit), amortization of (gain) loss, amortization of transition (asset) obligation, settlement (gain) loss, curtailment (gain) loss and certain termination benefits.

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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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