Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021	Sep. 07, 2021
Finite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	$ 979.4	$ 963.0	$ 963.0
Accumulated amortization	(101.3)	(41.4)
Intangible assets subject to amortization, net amount	878.1	921.6
Intangible assets not subject to amortization			$ 6.6
Total intangible assets, gross carrying amount	986.2	969.7
Intangible assets, net amount	884.9	928.3
FCC Licenses and Spectrum Usage Rights [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization	6.8	6.7
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	863.1	850.0
Accumulated amortization	(88.0)	(36.2)
Intangible assets subject to amortization, net amount	775.1	813.8
Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	110.3	108.0
Accumulated amortization	(12.7)	(5.0)
Intangible assets subject to amortization, net amount	97.6	103.0
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	6.0	5.0
Accumulated amortization	(0.6)	(0.2)
Intangible assets subject to amortization, net amount	$ 5.4	$ 4.8