Goodwill and Intangible Assets - Changes in Carrying Amounts of Goodwill by Reportable Segment (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Goodwill [Line Items]
Gross goodwill	$ 2,163.4	$ 2,159.4
Less: impairment charges	(1,423.7)	(1,423.7)
Goodwill [Roll Forward]
Goodwill, beginning balance	735.7
Foreign currency translation	4.0
Goodwill, ending balance	739.7
Previously Reported
Goodwill [Line Items]
Gross goodwill	3,045.3
Less: impairment charges	(2,305.6)
Public Cloud
Goodwill [Line Items]
Gross goodwill	597.4	596.2
Less: impairment charges	(454.6)	(454.6)
Goodwill [Roll Forward]
Goodwill, beginning balance	141.6
Foreign currency translation	1.2
Goodwill, ending balance	142.8
Private Cloud
Goodwill [Line Items]
Gross goodwill	1,566.0	1,563.2
Less: impairment charges	(969.1)	$ (969.1)
Goodwill [Roll Forward]
Goodwill, beginning balance	594.1
Foreign currency translation	2.8
Goodwill, ending balance	$ 596.9