Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Sep. 07, 2021
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	$ 977.6	$ 963.0	$ 963.0
Accumulated amortization	(162.2)	(41.4)
Intangible assets subject to amortization, net amount	815.4	921.6
Intangible assets not subject to amortization			$ 6.6
Intangible assets, gross carrying amount	991.3	969.7
Intangible assets, net amount	829.1	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
Perpetual Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization	6.8
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	862.1	850.0
Accumulated amortization	(140.7)	(36.2)
Intangible assets subject to amortization, net amount	721.4	813.8
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	109.5	108.0
Accumulated amortization	(20.5)	(5.0)
Intangible assets subject to amortization, net amount	89.0	103.0
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	6.0	5.0
Accumulated amortization	(1.0)	(0.2)
Intangible assets subject to amortization, net amount	$ 5.0	$ 4.8