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Derivative Instruments (Impact of Derivative Instruments on Borrowing Costs) (Details)	Mar. 31, 2019
Derivative [Line Items]
Impact of derivative instruments on borrowing costs	(0.42%)
Virgin Media
Derivative [Line Items]
Impact of derivative instruments on borrowing costs	(0.43%)
UPC Holding
Derivative [Line Items]
Impact of derivative instruments on borrowing costs	(0.18%)
Telenet
Derivative [Line Items]
Impact of derivative instruments on borrowing costs	(0.69%)

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- Definition

Impact of Derivative Instruments on Borrowing Costs, Percent Increase (Decrease)

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Details

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- Details

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