Segment Information - Schedule of Reconciliation of Total Segment Assets to Total Consolidated Assets (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Segment Reporting [Line Items]
Assets	$ 1,671.8	$ 1,913.2
Operating Segments | Starz Networks
Segment Reporting [Line Items]
Assets	1,560.3	1,818.2
Other unallocated assets
Segment Reporting [Line Items]
Assets	$ 111.5	$ 95.0