v3.26.1
Segment Reporting - Schedule of Revenue by Major Category (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Principal Transaction Revenue [Line Items]        
Total $ 1,102.6 $ 1,086.7 $ 2,185.4 $ 2,170.2
Total residential revenue        
Principal Transaction Revenue [Line Items]        
Total 745.2 746.9 1,483.5 1,495.7
Total residential fixed revenue        
Principal Transaction Revenue [Line Items]        
Total 311.2 326.0 619.0 652.5
Subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 292.3 304.4 584.0 609.1
Non-subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 18.9 21.6 35.0 43.4
Total residential mobile revenue        
Principal Transaction Revenue [Line Items]        
Total 434.0 420.9 864.5 843.2
Service revenue        
Principal Transaction Revenue [Line Items]        
Total 325.5 310.7 640.4 621.6
Interconnect, inbound roaming, equipment sales and other        
Principal Transaction Revenue [Line Items]        
Total 108.5 110.2 224.1 221.6
B2B revenue        
Principal Transaction Revenue [Line Items]        
Total 350.8 334.1 689.6 662.2
Other revenue        
Principal Transaction Revenue [Line Items]        
Total 6.6 5.7 12.3 12.3
Mobile Service Revenue        
Principal Transaction Revenue [Line Items]        
Total 60.0 56.0 124.0 116.0
B2B Mobile Handset and Other Devices        
Principal Transaction Revenue [Line Items]        
Total 8.0 7.0 17.0 13.0
Liberty Networks        
Principal Transaction Revenue [Line Items]        
Total (23.0) 23.0 45.0 46.0
Operating Segments        
Principal Transaction Revenue [Line Items]        
Total 1,125.0 1,110.8 2,230.5 2,218.7
Operating Segments | Total residential revenue        
Principal Transaction Revenue [Line Items]        
Total 237.7 252.5 484.3  
Operating Segments | Liberty Caribbean        
Principal Transaction Revenue [Line Items]        
Total 361.7 366.3 716.2 730.2
Operating Segments | Liberty Caribbean | Total residential revenue        
Principal Transaction Revenue [Line Items]        
Total 233.1 237.5 461.7 476.7
Operating Segments | Liberty Caribbean | Total residential fixed revenue        
Principal Transaction Revenue [Line Items]        
Total 119.1 128.3 238.0 257.2
Operating Segments | Liberty Caribbean | Subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 114.4 123.7 228.7 247.2
Operating Segments | Liberty Caribbean | Non-subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 4.7 4.6 9.3 10.0
Operating Segments | Liberty Caribbean | Total residential mobile revenue        
Principal Transaction Revenue [Line Items]        
Total 114.0 109.2 223.7 219.5
Operating Segments | Liberty Caribbean | Service revenue        
Principal Transaction Revenue [Line Items]        
Total 96.6 89.4 188.8 178.4
Operating Segments | Liberty Caribbean | Interconnect, inbound roaming, equipment sales and other        
Principal Transaction Revenue [Line Items]        
Total 17.4 19.8 34.9 41.1
Operating Segments | Liberty Caribbean | B2B revenue        
Principal Transaction Revenue [Line Items]        
Total 128.6 128.8 254.5 253.5
Operating Segments | Liberty Caribbean | Other revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Operating Segments | C&W Panama        
Principal Transaction Revenue [Line Items]        
Total 176.9 177.3 352.4 354.3
Operating Segments | C&W Panama | Total residential revenue        
Principal Transaction Revenue [Line Items]        
Total 119.7 118.3 238.3 235.9
Operating Segments | C&W Panama | Total residential fixed revenue        
Principal Transaction Revenue [Line Items]        
Total 31.6 31.2 63.1 62.4
Operating Segments | C&W Panama | Subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 30.2 29.9 60.8 59.8
Operating Segments | C&W Panama | Non-subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 1.4 1.3 2.3 2.6
Operating Segments | C&W Panama | Total residential mobile revenue        
Principal Transaction Revenue [Line Items]        
Total 88.1 87.1 175.2 173.5
Operating Segments | C&W Panama | Service revenue        
Principal Transaction Revenue [Line Items]        
Total 72.0 71.0 144.1 142.2
Operating Segments | C&W Panama | Interconnect, inbound roaming, equipment sales and other        
Principal Transaction Revenue [Line Items]        
Total 16.1 16.1 31.1 31.3
Operating Segments | C&W Panama | B2B revenue        
Principal Transaction Revenue [Line Items]        
Total 57.2 59.0 114.1 118.4
Operating Segments | C&W Panama | Other revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Operating Segments | Liberty Networks        
Principal Transaction Revenue [Line Items]        
Total 130.4 114.6 251.6 225.0
Operating Segments | Liberty Networks | Total residential revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Operating Segments | Liberty Networks | Total residential fixed revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Operating Segments | Liberty Networks | Subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Operating Segments | Liberty Networks | Non-subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Operating Segments | Liberty Networks | Total residential mobile revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Operating Segments | Liberty Networks | Service revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 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 0.0 0.0
Operating Segments | Liberty Networks | B2B revenue        
Principal Transaction Revenue [Line Items]        
Total 130.4 114.6 251.6 225.0
Operating Segments | Liberty Networks | Other revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Operating Segments | Liberty Puerto Rico        
Principal Transaction Revenue [Line Items]        
Total 287.5 301.3 583.7 599.7
Operating Segments | Liberty Puerto Rico | Total residential revenue        
Principal Transaction Revenue [Line Items]        
Total       500.6
Operating Segments | Liberty Puerto Rico | Total residential fixed revenue        
Principal Transaction Revenue [Line Items]        
Total 119.4 124.8 240.2 248.6
Operating Segments | Liberty Puerto Rico | Subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 113.8 118.9 228.4 236.9
Operating Segments | Liberty Puerto Rico | Non-subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 5.6 5.9 11.8 11.7
Operating Segments | Liberty Puerto Rico | Total residential mobile revenue        
Principal Transaction Revenue [Line Items]        
Total 118.3 127.7 244.1 252.0
Operating Segments | Liberty Puerto Rico | Service revenue        
Principal Transaction Revenue [Line Items]        
Total 72.4 78.2 143.7 157.2
Operating Segments | Liberty Puerto Rico | Interconnect, inbound roaming, equipment sales and other        
Principal Transaction Revenue [Line Items]        
Total 45.9 49.5 100.4 94.8
Operating Segments | Liberty Puerto Rico | B2B revenue        
Principal Transaction Revenue [Line Items]        
Total 43.2 43.1 87.1 86.8
Operating Segments | Liberty Puerto Rico | Other revenue        
Principal Transaction Revenue [Line Items]        
Total 6.6 5.7 12.3 12.3
Operating Segments | Liberty Costa Rica        
Principal Transaction Revenue [Line Items]        
Total 168.5 151.3 326.6 309.5
Operating Segments | Liberty Costa Rica | Total residential revenue        
Principal Transaction Revenue [Line Items]        
Total 151.7 135.4 293.2 275.8
Operating Segments | Liberty Costa Rica | Total residential fixed revenue        
Principal Transaction Revenue [Line Items]        
Total 41.1 41.7 77.7 84.3
Operating Segments | Liberty Costa Rica | Subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 33.9 31.9 66.1 65.2
Operating Segments | Liberty Costa Rica | Non-subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 7.2 9.8 11.6 19.1
Operating Segments | Liberty Costa Rica | Total residential mobile revenue        
Principal Transaction Revenue [Line Items]        
Total 110.6 93.7 215.5 191.5
Operating Segments | Liberty Costa Rica | Service revenue        
Principal Transaction Revenue [Line Items]        
Total 84.5 72.1 163.8 143.8
Operating Segments | Liberty Costa Rica | Interconnect, inbound roaming, equipment sales and other        
Principal Transaction Revenue [Line Items]        
Total 26.1 21.6 51.7 47.7
Operating Segments | Liberty Costa Rica | B2B revenue        
Principal Transaction Revenue [Line Items]        
Total 16.8 15.9 33.4 33.7
Operating Segments | Liberty Costa Rica | Other revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Corporate        
Principal Transaction Revenue [Line Items]        
Total 3.6 3.8 7.1 7.7
Corporate | Total residential revenue        
Principal Transaction Revenue [Line Items]        
Total 2.8 3.2 5.8 6.7
Corporate | Total residential fixed revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Corporate | Subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Corporate | Non-subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Corporate | Total residential mobile revenue        
Principal Transaction Revenue [Line Items]        
Total 2.8 3.2 5.8 6.7
Corporate | Service revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Corporate | Interconnect, inbound roaming, equipment sales and other        
Principal Transaction Revenue [Line Items]        
Total 2.8 3.2 5.8 6.7
Corporate | B2B revenue        
Principal Transaction Revenue [Line Items]        
Total 0.8 0.6 1.3 1.0
Corporate | Other revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Intersegment Eliminations        
Principal Transaction Revenue [Line Items]        
Total (26.0) (27.9) (52.2) (56.2)
Intersegment Eliminations | Total residential revenue        
Principal Transaction Revenue [Line Items]        
Total 0.2 0.0 0.2 0.0
Intersegment Eliminations | Total residential fixed revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Intersegment Eliminations | Subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Intersegment Eliminations | Non-subscription revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Intersegment Eliminations | Total residential mobile revenue        
Principal Transaction Revenue [Line Items]        
Total 0.2 0.0 0.2 0.0
Intersegment Eliminations | Service revenue        
Principal Transaction Revenue [Line Items]        
Total 0.0 0.0 0.0 0.0
Intersegment Eliminations | Interconnect, inbound roaming, equipment sales and other        
Principal Transaction Revenue [Line Items]        
Total 0.2 0.0 0.2 0.0
Intersegment Eliminations | B2B revenue        
Principal Transaction Revenue [Line Items]        
Total (26.2) (27.9) (52.4) (56.2)
Intersegment Eliminations | Other revenue        
Principal Transaction Revenue [Line Items]        
Total $ 0.0 $ 0.0 $ 0.0 $ 0.0