v3.26.1
Segment Reporting - Schedule of Revenue by Major Category (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Principal Transaction Revenue [Line Items]    
Total $ 1,082.8 $ 1,083.5
Total residential revenue    
Principal Transaction Revenue [Line Items]    
Total 738.3 748.8
Total residential fixed revenue    
Principal Transaction Revenue [Line Items]    
Total 307.8 326.5
Subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 291.7 304.7
Non-subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 16.1 21.8
Total residential mobile revenue    
Principal Transaction Revenue [Line Items]    
Total 430.5 422.3
Service revenue    
Principal Transaction Revenue [Line Items]    
Total 314.9 310.9
Interconnect, inbound roaming, equipment sales and other    
Principal Transaction Revenue [Line Items]    
Total 115.6 111.4
B2B revenue    
Principal Transaction Revenue [Line Items]    
Total 338.8 328.1
Other revenue    
Principal Transaction Revenue [Line Items]    
Total 5.7 6.6
Mobile Handset    
Principal Transaction Revenue [Line Items]    
Total 64.0  
B2B Mobile Handset and Other Devices    
Principal Transaction Revenue [Line Items]    
Total 9.0 6.0
Mobile Service Revenue    
Principal Transaction Revenue [Line Items]    
Total   60.0
Liberty Networks    
Principal Transaction Revenue [Line Items]    
Total   23.0
Liberty Networks, Other    
Principal Transaction Revenue [Line Items]    
Total 23.0  
Operating Segments    
Principal Transaction Revenue [Line Items]    
Total 1,105.5 1,107.9
Operating Segments | Total residential revenue    
Principal Transaction Revenue [Line Items]    
Total 246.6  
Operating Segments | Liberty Caribbean    
Principal Transaction Revenue [Line Items]    
Total 354.5 363.9
Operating Segments | Liberty Caribbean | Total residential revenue    
Principal Transaction Revenue [Line Items]    
Total 228.6 239.2
Operating Segments | Liberty Caribbean | Total residential fixed revenue    
Principal Transaction Revenue [Line Items]    
Total 118.9 128.9
Operating Segments | Liberty Caribbean | Subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 114.3 123.5
Operating Segments | Liberty Caribbean | Non-subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 4.6 5.4
Operating Segments | Liberty Caribbean | Total residential mobile revenue    
Principal Transaction Revenue [Line Items]    
Total 109.7 110.3
Operating Segments | Liberty Caribbean | Service revenue    
Principal Transaction Revenue [Line Items]    
Total 92.2 89.0
Operating Segments | Liberty Caribbean | Interconnect, inbound roaming, equipment sales and other    
Principal Transaction Revenue [Line Items]    
Total 17.5 21.3
Operating Segments | Liberty Caribbean | B2B revenue    
Principal Transaction Revenue [Line Items]    
Total 125.9 124.7
Operating Segments | Liberty Caribbean | Other revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Operating Segments | C&W Panama    
Principal Transaction Revenue [Line Items]    
Total 175.5 177.0
Operating Segments | C&W Panama | Total residential revenue    
Principal Transaction Revenue [Line Items]    
Total 118.6 117.6
Operating Segments | C&W Panama | Total residential fixed revenue    
Principal Transaction Revenue [Line Items]    
Total 31.5 31.2
Operating Segments | C&W Panama | Subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 30.6 29.9
Operating Segments | C&W Panama | Non-subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 0.9 1.3
Operating Segments | C&W Panama | Total residential mobile revenue    
Principal Transaction Revenue [Line Items]    
Total 87.1 86.4
Operating Segments | C&W Panama | Service revenue    
Principal Transaction Revenue [Line Items]    
Total 72.1 71.2
Operating Segments | C&W Panama | Interconnect, inbound roaming, equipment sales and other    
Principal Transaction Revenue [Line Items]    
Total 15.0 15.2
Operating Segments | C&W Panama | B2B revenue    
Principal Transaction Revenue [Line Items]    
Total 56.9 59.4
Operating Segments | C&W Panama | Other revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Operating Segments | Liberty Networks    
Principal Transaction Revenue [Line Items]    
Total 121.2 110.4
Operating Segments | Liberty Networks | Total residential revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Operating Segments | Liberty Networks | Total residential fixed revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Operating Segments | Liberty Networks | Subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Operating Segments | Liberty Networks | Non-subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Operating Segments | Liberty Networks | Total residential mobile revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Operating Segments | Liberty Networks | Service revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Operating Segments | Liberty Networks | Interconnect, inbound roaming, equipment sales and other    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Operating Segments | Liberty Networks | B2B revenue    
Principal Transaction Revenue [Line Items]    
Total 121.2 110.4
Operating Segments | Liberty Networks | Other revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Operating Segments | Liberty Puerto Rico    
Principal Transaction Revenue [Line Items]    
Total 296.2 298.4
Operating Segments | Liberty Puerto Rico | Total residential revenue    
Principal Transaction Revenue [Line Items]    
Total   248.1
Operating Segments | Liberty Puerto Rico | Total residential fixed revenue    
Principal Transaction Revenue [Line Items]    
Total 120.8 123.8
Operating Segments | Liberty Puerto Rico | Subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 114.6 118.0
Operating Segments | Liberty Puerto Rico | Non-subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 6.2 5.8
Operating Segments | Liberty Puerto Rico | Total residential mobile revenue    
Principal Transaction Revenue [Line Items]    
Total 125.8 124.3
Operating Segments | Liberty Puerto Rico | Service revenue    
Principal Transaction Revenue [Line Items]    
Total 71.3 79.0
Operating Segments | Liberty Puerto Rico | Interconnect, inbound roaming, equipment sales and other    
Principal Transaction Revenue [Line Items]    
Total 54.5 45.3
Operating Segments | Liberty Puerto Rico | B2B revenue    
Principal Transaction Revenue [Line Items]    
Total 43.9 43.7
Operating Segments | Liberty Puerto Rico | Other revenue    
Principal Transaction Revenue [Line Items]    
Total 5.7 6.6
Operating Segments | Liberty Costa Rica    
Principal Transaction Revenue [Line Items]    
Total 158.1 158.2
Operating Segments | Liberty Costa Rica | Total residential revenue    
Principal Transaction Revenue [Line Items]    
Total 141.5 140.4
Operating Segments | Liberty Costa Rica | Total residential fixed revenue    
Principal Transaction Revenue [Line Items]    
Total 36.6 42.6
Operating Segments | Liberty Costa Rica | Subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 32.2 33.3
Operating Segments | Liberty Costa Rica | Non-subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 4.4 9.3
Operating Segments | Liberty Costa Rica | Total residential mobile revenue    
Principal Transaction Revenue [Line Items]    
Total 104.9 97.8
Operating Segments | Liberty Costa Rica | Service revenue    
Principal Transaction Revenue [Line Items]    
Total 79.3 71.7
Operating Segments | Liberty Costa Rica | Interconnect, inbound roaming, equipment sales and other    
Principal Transaction Revenue [Line Items]    
Total 25.6 26.1
Operating Segments | Liberty Costa Rica | B2B revenue    
Principal Transaction Revenue [Line Items]    
Total 16.6 17.8
Operating Segments | Liberty Costa Rica | Other revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Corporate    
Principal Transaction Revenue [Line Items]    
Total 3.5 3.9
Corporate | Total residential revenue    
Principal Transaction Revenue [Line Items]    
Total 3.0 3.5
Corporate | Total residential fixed revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Corporate | Subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Corporate | Non-subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Corporate | Total residential mobile revenue    
Principal Transaction Revenue [Line Items]    
Total 3.0 3.5
Corporate | Service revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Corporate | Interconnect, inbound roaming, equipment sales and other    
Principal Transaction Revenue [Line Items]    
Total 3.0 3.5
Corporate | B2B revenue    
Principal Transaction Revenue [Line Items]    
Total 0.5 0.4
Corporate | Other revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Intersegment Eliminations    
Principal Transaction Revenue [Line Items]    
Total (26.2) (28.3)
Intersegment Eliminations | Total residential revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Intersegment Eliminations | Total residential fixed revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Intersegment Eliminations | Subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Intersegment Eliminations | Non-subscription revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Intersegment Eliminations | Total residential mobile revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Intersegment Eliminations | Service revenue    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Intersegment Eliminations | Interconnect, inbound roaming, equipment sales and other    
Principal Transaction Revenue [Line Items]    
Total 0.0 0.0
Intersegment Eliminations | B2B revenue    
Principal Transaction Revenue [Line Items]    
Total (26.2) (28.3)
Intersegment Eliminations | Other revenue    
Principal Transaction Revenue [Line Items]    
Total $ 0.0 $ 0.0