Derivative Instruments (Impact of Derivative Instruments on Borrowing Costs) (Details)	Mar. 31, 2022
Derivative [Line Items]
Impact of derivative instruments on borrowing costs	(0.14%)
VM Ireland
Derivative [Line Items]
Impact of derivative instruments on borrowing costs	0.42%
UPC Holding
Derivative [Line Items]
Impact of derivative instruments on borrowing costs	(0.35%)
Telenet
Derivative [Line Items]
Impact of derivative instruments on borrowing costs	0.09%