Goodwill and Intangible Assets, net - Components of Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Jun. 30, 2024
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 5,767.9	$ 5,227.3
Intangible assets, accumulated amortization	(4,028.8)	(3,891.3)
Intangible assets, net	1,739.1	1,336.0
Software and software licenses
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	4,098.6	3,803.7
Intangible assets, accumulated amortization	(2,743.5)	(2,642.6)
Customer contracts and lists
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	1,420.0	1,181.6
Intangible assets, accumulated amortization	(1,042.9)	(1,007.6)
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	249.3	242.0
Intangible assets, accumulated amortization	$ (242.4)	$ (241.1)