Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 07, 2021
Finite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	$ 976.8	$ 963.0	$ 963.0
Accumulated amortization	(131.9)	(41.4)
Intangible assets subject to amortization, net amount	844.9	921.6
Intangible assets not subject to amortization			$ 6.6
Total intangible assets, gross carrying amount	983.7	969.7
Intangible assets, net amount	851.8	928.3
FCC Licenses and Spectrum Usage Rights [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization	6.9	6.7
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	861.4	850.0
Accumulated amortization	(114.2)	(36.2)
Intangible assets subject to amortization, net amount	747.2	813.8
Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	109.3	108.0
Accumulated amortization	(16.9)	(5.0)
Intangible assets subject to amortization, net amount	92.4	103.0
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	6.1	5.0
Accumulated amortization	(0.8)	(0.2)
Intangible assets subject to amortization, net amount	$ 5.3	$ 4.8