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Revenue and Contracts in Process - Schedule of Spectrum Segment Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenue	$ 315.2	$ 317.9
Spectrum
Segment Reporting Information [Line Items]
Revenue	6.3	5.7
Broadcast station | Spectrum
Segment Reporting Information [Line Items]
Revenue	6.3	5.2
Other | Spectrum
Segment Reporting Information [Line Items]
Revenue	$ 0.0	$ 0.5

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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