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v3.19.1

Segment Reporting (Geographic Segments) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Segment Reporting Information [Line Items] |  |
Revenue | $ 2,868.0 | $ 3,063.5
VodafoneZiggo JV |  |
Segment Reporting Information [Line Items] |  |
Revenue | 1,093.9 | 1,196.6
Operating Segments | U.K. |  |
Segment Reporting Information [Line Items] |  |
Revenue | 1,533.5 | 1,644.4
Operating Segments | Belgium |  |
Segment Reporting Information [Line Items] |  |
Revenue | 711.9 | 759.6
Operating Segments | Switzerland |  |
Segment Reporting Information [Line Items] |  |
Revenue | 316.0 | 344.9
Operating Segments | Ireland |  |
Segment Reporting Information [Line Items] |  |
Revenue | 127.8 | 133.8
Operating Segments | Poland |  |
Segment Reporting Information [Line Items] |  |
Revenue | 106.7 | 116.0
Operating Segments | Slovakia |  |
Segment Reporting Information [Line Items] |  |
Revenue | 12.4 | 13.5
Other, including intersegment eliminations |  |
Segment Reporting Information [Line Items] |  |
Revenue | $ 59.7 | $ 51.3

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