Segment Reporting - Property and Equipment Additions of our Reportable Segments (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Total property and equipment additions	$ 419.8	$ 485.2
Assets acquired under capital-related vendor financing arrangements	(88.9)	(117.5)
Changes in current liabilities related to capital expenditures and other	27.3	9.0
Total capital expenditures, net	358.2	376.7
Corporate
Segment Reporting Information [Line Items]
Total property and equipment additions	17.8	32.4
Liberty Caribbean \| Operating Segments
Segment Reporting Information [Line Items]
Total property and equipment additions	136.9	150.6
C&W Panama \| Operating Segments
Segment Reporting Information [Line Items]
Total property and equipment additions	64.7	74.9
Liberty Networks \| Operating Segments
Segment Reporting Information [Line Items]
Total property and equipment additions	50.1	36.2
Liberty Puerto Rico \| Operating Segments
Segment Reporting Information [Line Items]
Total property and equipment additions	94.1	135.8
Liberty Costa Rica \| Operating Segments
Segment Reporting Information [Line Items]
Total property and equipment additions	$ 56.2	$ 55.3

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