Segment Reporting - Revenue by Major Category (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | $ 848.9 | $ 982.9 | $ 1,779.9 | $ 1,925.6 |
Total residential revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 587.4 | 675.8 | 1,216.6 | 1,330 |
Total residential fixed revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 449.3 | 492.1 | 913.4 | 973.2 |
Total subscription revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 428.8 | 463.3 | 865.4 | 915.4 |
Video | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 166.9 | 190.4 | 342.1 | 378.1 |
Broadband internet | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 213 | 214.4 | 423.9 | 421.3 |
Fixed-line telephony | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 48.9 | 58.5 | 99.4 | 116 |
Non-Subscription revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 20.5 | 28.8 | 48 | 57.8 |
Total residential mobile revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 138.1 | 183.7 | 303.2 | 356.8 |
Service revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 119.3 | 158 | 264.8 | 308.7 |
Interconnect, equipment sales and other | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 18.8 | 25.7 | 38.4 | 48.1 |
Total B2B revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 261.5 | 307.1 | 563.3 | 595.6 |
Service revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 203.8 | 248.7 | 438 | 477.3 |
Sub-Ssea network revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 57.7 | 58.4 | 125.3 | 118.3 |
Mobile Handset | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 6 | 13 | 16 | 20 |
B2B Mobile Handset and Other Devices | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 3 | 9 | 6 | 13 |
Operating Segments | C&W | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 515.3 | 606.6 | 1,103.9 | 1,176.4 |
Operating Segments | C&W | Total residential revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 271.4 | 318.2 | 577 | 615.6 |
Operating Segments | C&W | Total residential fixed revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 148.7 | 153.9 | 305.8 | 297.3 |
Operating Segments | C&W | Total subscription revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 137.4 | 139 | 277.6 | 267.4 |
Operating Segments | C&W | Video | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 42.7 | 46.8 | 87.6 | 90.7 |
Operating Segments | C&W | Broadband internet | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 70.5 | 65.5 | 141.5 | 125.7 |
Operating Segments | C&W | Fixed-line telephony | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 24.2 | 26.7 | 48.5 | 51 |
Operating Segments | C&W | Non-Subscription revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 11.3 | 14.9 | 28.2 | 29.9 |
Operating Segments | C&W | Total residential mobile revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 122.7 | 164.3 | 271.2 | 318.3 |
Operating Segments | C&W | Service revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 105.5 | 142.1 | 236.4 | 277.1 |
Operating Segments | C&W | Interconnect, equipment sales and other | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 17.2 | 22.2 | 34.8 | 41.2 |
Operating Segments | C&W | Total B2B revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 243.9 | 288.4 | 526.9 | 560.8 |
Operating Segments | C&W | Service revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 183.5 | 228.4 | 396.9 | 439.3 |
Operating Segments | C&W | Sub-Ssea network revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 60.4 | 60 | 130 | 121.5 |
Operating Segments | VTR/Cabletica | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 227.7 | 274.5 | 467.8 | 551 |
Operating Segments | VTR/Cabletica | Total residential revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 220.1 | 267.2 | 452.4 | 536.2 |
Operating Segments | VTR/Cabletica | Total residential fixed revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 204.7 | 247.8 | 420.4 | 497.7 |
Operating Segments | VTR/Cabletica | Total subscription revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 199.3 | 239.5 | 409 | 480.7 |
Operating Segments | VTR/Cabletica | Video | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 87.5 | 108.3 | 182.5 | 217.1 |
Operating Segments | VTR/Cabletica | Broadband internet | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 93.3 | 105.3 | 187.7 | 210.2 |
Operating Segments | VTR/Cabletica | Fixed-line telephony | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 18.5 | 25.9 | 38.8 | 53.4 |
Operating Segments | VTR/Cabletica | Non-Subscription revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 5.4 | 8.3 | 11.4 | 17 |
Operating Segments | VTR/Cabletica | Total residential mobile revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 15.4 | 19.4 | 32 | 38.5 |
Operating Segments | VTR/Cabletica | Service revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 13.8 | 15.9 | 28.4 | 31.6 |
Operating Segments | VTR/Cabletica | Interconnect, equipment sales and other | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 1.6 | 3.5 | 3.6 | 6.9 |
Operating Segments | VTR/Cabletica | Total B2B revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 7.6 | 7.3 | 15.4 | 14.8 |
Operating Segments | VTR/Cabletica | Service revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 7.6 | 7.3 | 15.4 | 14.8 |
Operating Segments | VTR/Cabletica | Sub-Ssea network revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Operating Segments | Liberty Puerto Rico | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 109.1 | 103.8 | 213.7 | 202.4 |
Operating Segments | Liberty Puerto Rico | Total residential revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 95.9 | 90.4 | 187.2 | 178.2 |
Operating Segments | Liberty Puerto Rico | Total residential fixed revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 95.9 | 90.4 | 187.2 | 178.2 |
Operating Segments | Liberty Puerto Rico | Total subscription revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 92.1 | 84.8 | 178.8 | 167.3 |
Operating Segments | Liberty Puerto Rico | Video | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 36.7 | 35.3 | 72 | 70.3 |
Operating Segments | Liberty Puerto Rico | Broadband internet | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 49.2 | 43.6 | 94.7 | 85.4 |
Operating Segments | Liberty Puerto Rico | Fixed-line telephony | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 6.2 | 5.9 | 12.1 | 11.6 |
Operating Segments | Liberty Puerto Rico | Non-Subscription revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 3.8 | 5.6 | 8.4 | 10.9 |
Operating Segments | Liberty Puerto Rico | Total residential mobile revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Operating Segments | Liberty Puerto Rico | Service revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Operating Segments | Liberty Puerto Rico | Interconnect, equipment sales and other | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Operating Segments | Liberty Puerto Rico | Total B2B revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 13.2 | 13.4 | 26.5 | 24.2 |
Operating Segments | Liberty Puerto Rico | Service revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 13.2 | 13.4 | 26.5 | 24.2 |
Operating Segments | Liberty Puerto Rico | Sub-Ssea network revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Intersegment Eliminations | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | (3.2) | (2) | (5.5) | (4.2) |
Intersegment Eliminations | Total residential revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Intersegment Eliminations | Total residential fixed revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Intersegment Eliminations | Total subscription revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Intersegment Eliminations | Video | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Intersegment Eliminations | Broadband internet | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Intersegment Eliminations | Fixed-line telephony | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Intersegment Eliminations | Non-Subscription revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | | 0 |
Intersegment Eliminations | Total residential mobile revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Intersegment Eliminations | Service revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Intersegment Eliminations | Interconnect, equipment sales and other | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | 0 | 0 | 0 | 0 |
Intersegment Eliminations | Total B2B revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | (3.2) | (2) | (5.5) | (4.2) |
Intersegment Eliminations | Service revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | (0.5) | (0.4) | (0.8) | (1) |
Intersegment Eliminations | Sub-Ssea network revenue | | | | |
Principal Transaction Revenue [Line Items] | | | | |
Revenue | $ (2.7) | $ (1.6) | $ (4.7) | $ (3.2) |