Goodwill and Intangible Assets, Net - Components of Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2025
Intangible Asset, Finite-Lived [Line Items]
Total - gross	$ 6,106.8	$ 5,782.8
Total - accumulated amortization	(4,453.5)	(4,179.8)
Intangible assets, net	1,653.3	1,603.0
Software and software licenses
Intangible Asset, Finite-Lived [Line Items]
Total - gross	4,369.7	4,103.6
Total - accumulated amortization	(3,023.4)	(2,830.3)
Customer contracts and lists
Intangible Asset, Finite-Lived [Line Items]
Total - gross	1,487.0	1,429.4
Total - accumulated amortization	(1,184.4)	(1,105.6)
Other intangibles
Intangible Asset, Finite-Lived [Line Items]
Total - gross	250.1	249.8
Total - accumulated amortization	$ (245.7)	$ (243.9)