Goodwill and Intangible Assets, net - Components Of Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	Mar. 31, 2021	Jun. 30, 2020
Finite-Lived Intangible Assets [Line Items]
Total - gross	$ 4,181.6	$ 3,979.5
Total - accumulated amortization	(2,968.8)	(2,763.7)
Intangible assets, net	1,212.8	1,215.8
Software and software licenses
Finite-Lived Intangible Assets [Line Items]
Total - gross	2,902.0	2,719.1
Total - accumulated amortization	(2,041.7)	(1,912.0)
Customer contracts and lists
Finite-Lived Intangible Assets [Line Items]
Total - gross	1,040.2	1,021.2
Total - accumulated amortization	(699.9)	(628.3)
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Total - gross	239.4	239.2
Total - accumulated amortization	$ (227.2)	$ (223.4)