Segment Information - Segment Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting [Line Items]
Total revenue	$ 307,900,000	$ 319,700,000	$ 614,800,000	$ 650,300,000
Operating expenses:
Programming amortization	114,100,000	162,500,000	252,400,000	280,900,000
Payroll				60,800,000
Advertising and marketing	70,300,000	63,400,000	120,700,000	122,300,000
Other				68,900,000
Depreciation and amortization	67,300,000	48,700,000	135,800,000	96,800,000
Restructuring and other	151,200,000	6,400,000	290,300,000	189,800,000
Total expenses	483,400,000	346,600,000	943,100,000	819,500,000
Operating loss	(175,500,000)	(26,900,000)	(328,300,000)	(169,200,000)
Interest expense	(13,600,000)	(13,200,000)	(27,500,000)	(24,100,000)
Interest and other income	500,000	0	900,000	1,700,000
Other expense	(2,000,000.0)	(2,500,000)	(3,800,000)	(4,300,000)
Loss on extinguishment of debt	0	0	0	(700,000)
Loss from continuing operations	(190,600,000)	(42,600,000)	(358,700,000)	(196,600,000)
Income tax benefit	1,200,000	100,000	4,400,000	100,000
Net loss from continuing operations	(189,400,000)	(42,500,000)	(354,300,000)	(196,500,000)
OTT revenue
Segment Reporting [Line Items]
Total revenue	221,300,000	221,100,000	432,400,000	446,600,000
Linear and other revenue
Segment Reporting [Line Items]
Total revenue	86,600,000	98,600,000	182,400,000	203,700,000
International
Segment Reporting [Line Items]
Total revenue	0	0	0	4,400,000
Operating expenses:
Programming amortization				2,300,000
Payroll				600,000
Advertising and marketing				200,000
Other				0
Depreciation and amortization				0
Restructuring and other				6,700,000
Total expenses				9,800,000
Operating loss				(5,400,000)
Interest expense				0
Interest and other income				0
Other expense				0
Loss on extinguishment of debt				0
Loss from continuing operations				(5,400,000)
Income tax benefit				0
Net loss from continuing operations				(5,400,000)
International | OTT revenue
Segment Reporting [Line Items]
Total revenue				2,000,000.0
International | Linear and other revenue
Segment Reporting [Line Items]
Total revenue				2,400,000
Starz Networks | Operating Segments
Segment Reporting [Line Items]
Total revenue	307,900,000	319,700,000	614,800,000	645,900,000
Operating expenses:
Programming amortization	114,100,000	162,500,000	252,400,000	278,600,000
Payroll	35,600,000	29,700,000	69,900,000	60,200,000
Advertising and marketing	70,300,000	63,400,000	120,700,000	122,100,000
Other	44,900,000	35,900,000	74,000,000.0	68,900,000
Depreciation and amortization	67,300,000	48,700,000	135,800,000	96,800,000
Restructuring and other	151,200,000	6,400,000	290,300,000	183,100,000
Total expenses	483,400,000	346,600,000	943,100,000	809,700,000
Operating loss	(175,500,000)	(26,900,000)	(328,300,000)	(163,800,000)
Interest expense	(13,600,000)	(13,200,000)	(27,500,000)	(24,100,000)
Interest and other income	500,000	0	900,000	1,700,000
Other expense	(2,000,000.0)	(2,500,000)	(3,800,000)	(4,300,000)
Loss on extinguishment of debt			0	(700,000)
Loss from continuing operations	(190,600,000)	(42,600,000)	(358,700,000)	(191,200,000)
Income tax benefit	1,200,000	100,000	4,400,000	100,000
Net loss from continuing operations	(189,400,000)	(42,500,000)	(354,300,000)	(191,100,000)
Starz Networks | Operating Segments | OTT revenue
Segment Reporting [Line Items]
Total revenue	221,300,000	221,100,000	432,400,000	444,600,000
Starz Networks | Operating Segments | Linear and other revenue
Segment Reporting [Line Items]
Total revenue	$ 86,600,000	$ 98,600,000	$ 182,400,000	$ 201,300,000