Segment Reporting - Schedule of Revenue and Adjusted OIBDA by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting [Line Items]
Revenue	$ 1,102.6	$ 1,086.7	$ 2,185.4	$ 2,170.2
Liberty Networks
Segment Reporting [Line Items]
Revenue	(23.0)	23.0	45.0	46.0
Operating Segments
Segment Reporting [Line Items]
Revenue	1,125.0	1,110.8	2,230.5	2,218.7
Adjusted OIBDA	453.1	444.2	883.0	880.4
Operating Segments \| Liberty Caribbean
Segment Reporting [Line Items]
Revenue	361.7	366.3	716.2	730.2
Adjusted OIBDA	164.5	173.8	327.9	347.1
Operating Segments \| C&W Panama
Segment Reporting [Line Items]
Revenue	176.9	177.3	352.4	354.3
Adjusted OIBDA	65.4	68.6	129.1	133.2
Operating Segments \| Liberty Networks
Segment Reporting [Line Items]
Revenue	130.4	114.6	251.6	225.0
Adjusted OIBDA	66.7	60.8	121.9	118.7
Operating Segments \| Liberty Puerto Rico
Segment Reporting [Line Items]
Revenue	287.5	301.3	583.7	599.7
Adjusted OIBDA	92.7	87.0	183.8	168.5
Operating Segments \| Liberty Costa Rica
Segment Reporting [Line Items]
Revenue	168.5	151.3	326.6	309.5
Adjusted OIBDA	63.8	54.0	120.3	112.9
Corporate
Segment Reporting [Line Items]
Revenue	3.6	3.8	7.1	7.7
Adjusted OIBDA	(17.1)	(29.2)	(41.9)	(58.8)
Intersegment eliminations
Segment Reporting [Line Items]
Revenue	$ (26.0)	$ (27.9)	$ (52.2)	$ (56.2)