Debt Obligations - Spectrum Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	34 Months Ended
	Aug. 31, 2027	Dec. 31, 2024	Dec. 31, 2023	Nov. 30, 2023
Debt Instrument [Line Items]
Accrued interest and exit fees (current portion)		$ 61.0	$ 17.1
Spectrum
Debt Instrument [Line Items]
Exit fees (non-current portion)			15.9
Spectrum | HC2 Broadcasting Holdings, Inc
Debt Instrument [Line Items]
Number of warrants outstanding (in shares)				145,825
Exercise price of warrants (in usd per share)				$ 0.01
Spectrum | Forecast
Debt Instrument [Line Items]
Exit fees	$ 2.0
Spectrum | Senior Notes
Debt Instrument [Line Items]
Additional exit fee payable			8.3
Exit fees (non-current portion)		15.9	15.9
Accrued interest and exit fees (current portion)		$ 20.5	$ 12.9
Spectrum | Weighted Average | Senior Notes
Debt Instrument [Line Items]
Interest rate, effective percentage		22.80%
Spectrum | 8.50% Note due 2025
Debt Instrument [Line Items]
Interest rate		8.50%
Spectrum | 11.45% Notes due 2025
Debt Instrument [Line Items]
Interest rate		11.45%