Property, Equipment and Software, net - Narrative (Details) - USD ($) $ in Millions		1 Months Ended		5 Months Ended	12 Months Ended
	Dec. 31, 2024	Mar. 31, 2024	Jul. 31, 2023	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Line Items]
Property value		$ 16.9
Gross proceeds from sale		17.5
Payments for brokerage fees and professional fees		0.6
Proceeds from sale of headquarters		$ 16.9
Loss on contract termination					$ 0.0	$ 12.1	$ 0.0
Total depreciation expense					141.3	208.7	220.9
Property, Plant, and Equipment and Finance Lease Right of Use Asset
Property, Plant and Equipment [Line Items]
Total depreciation expense					$ 141.3	208.7	220.9
Corporate And Reconciling Items
Property, Plant and Equipment [Line Items]
Loss on contract termination	$ 9.0
Corporate Headquarters Facility
Property, Plant and Equipment [Line Items]
Property, equipment, net				$ 16.9		16.9	12.1	$ 20.7	$ 82.7
Impairment of long-lived assets to be disposed of						3.8	70.6
Purchase price			$ 21.5
Impairment reversal						$ 8.6
Consideration adjustment				$ 17.5
OpenStack Public Cloud
Property, Plant and Equipment [Line Items]
Property equipment and software impairment charges							$ 15.3