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Other (Income)/Expense, Net - Summary of Other Income, Net (Details) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2023
Other Income, Net [Abstract] |  |  |
Interest income on corporate funds | $ (319.5) | $ (241.3) | $ (149.5)
Realized losses on available-for-sale securities, net | 1.7 | 5.9 | 14.7
Impairment of assets | 0.0 | 0.0 | 2.1
Gain on sale of assets | (5.0) | (17.1) | 0.0
Non-service components of pension income, net | (31.3) | (34.2) | (50.8)
Other income, net | $ (354.1) | $ (286.7) | $ (183.5)

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