Goodwill and Intangibles Assets, net - Components Of Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Jun. 30, 2020
Finite-Lived Intangible Assets [Line Items]
Total - gross	$ 4,109.4	$ 3,979.5
Total - accumulated amortization	(2,902.2)	(2,763.7)
Intangible assets, net	1,207.2	1,215.8
Software and software licenses
Finite-Lived Intangible Assets [Line Items]
Total - gross	2,831.3	2,719.1
Total - accumulated amortization	(1,995.6)	(1,912.0)
Customer contracts and lists
Finite-Lived Intangible Assets [Line Items]
Total - gross	1,038.9	1,021.2
Total - accumulated amortization	(680.8)	(628.3)
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Total - gross	239.2	239.2
Total - accumulated amortization	$ (225.8)	$ (223.4)