Goodwill and Intangibles Assets, net - Components Of Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Jun. 30, 2020
Finite-Lived Intangible Assets [Line Items]
Total - gross	$ 4,044.9	$ 3,979.5
Total - accumulated amortization	(2,829.0)	(2,763.7)
Intangible assets, net	1,215.9	1,215.8
Software and software licenses
Finite-Lived Intangible Assets [Line Items]
Total - gross	2,776.2	2,719.1
Total - accumulated amortization	(1,950.4)	(1,912.0)
Customer contracts and lists
Finite-Lived Intangible Assets [Line Items]
Total - gross	1,029.4	1,021.2
Total - accumulated amortization	(654.1)	(628.3)
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Total - gross	239.3	239.2
Total - accumulated amortization	$ (224.5)	$ (223.4)