Business Segment Information - Summary of Information About Network Segment Significant Expenses (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Revenue	$ 274.8		$ 272.8	$ 551.2	$ 544.4
Less: Significant and other segment expenses
Depreciation and amortization expense	87.3		80.3	171.9	157.7
Restructuring and severance related charges	(0.2)	$ 3.7	(0.3)	3.5	(0.1)
Total operating costs and expenses	263.4		275.0	529.1	549.4
Network operating income	11.4		(2.2)	22.1	(5.0)
Operating Segments [Member] | Network [Member]
Segment Reporting Information [Line Items]
Revenue	274.8		272.8	551.2	544.4
Less: Significant and other segment expenses
Employee and related costs	44.8		57.0	90.0	112.2
Programming expense	35.8		38.3	70.6	76.9
Network expense	5.9		8.3	13.4	17.5
Contract services	22.8		24.6	45.0	47.1
Other expenses	60.9		60.5	123.0	125.2
Depreciation and amortization expense	87.2		80.2	171.8	157.6
Restructuring and severance related charges	(0.2)	$ 3.7	(0.3)	3.5	(0.1)
Total operating costs and expenses	257.2		268.6	517.3	536.4
Network operating income	$ 17.6		$ 4.2	$ 33.9	$ 8.0