Derivative Instruments (Cross-currency Derivative Contracts) (Details) - 3 months ended Mar. 31, 2022 € in Millions, zł in Millions, SFr in Millions, $ in Millions	USD ($)	EUR (€)	CHF (SFr)	PLN (zł)
UPC Holding | Cross-Currency Swap 1
Derivative [Line Items]
Weighted average remaining life	3 years 6 months
UPC Holding | Cross-Currency Swap 2
Derivative [Line Items]
Weighted average remaining life	6 years 1 month 6 days
UPC Holding | Cross-Currency Swap 3
Derivative [Line Items]
Weighted average remaining life	3 years 10 months 24 days
UPC Holding | Cross-Currency Swap 4
Derivative [Line Items]
Weighted average remaining life	4 years 3 months 18 days
UPC Holding | Cross-Currency Swap 5
Derivative [Line Items]
Weighted average remaining life	3 years 9 months 18 days
UPC Holding | Cross-Currency Swap 6
Derivative [Line Items]
Weighted average remaining life	9 months 18 days
Telenet | Cross-Currency Swap 7
Derivative [Line Items]
Weighted average remaining life	4 years 9 months 18 days
Telenet | Cross-Currency Swap 8
Derivative [Line Items]
Weighted average remaining life	2 years 9 months 18 days
Notional amount due from counterparty | UPC Holding | Cross-Currency Swap 1
Derivative [Line Items]
Notional amount of derivative | $	$ 360.0
Notional amount due from counterparty | UPC Holding | Cross-Currency Swap 2
Derivative [Line Items]
Notional amount of derivative | $	4,650.0
Notional amount due from counterparty | UPC Holding | Cross-Currency Swap 3
Derivative [Line Items]
Notional amount of derivative		€ 2,650.0
Notional amount due from counterparty | UPC Holding | Cross-Currency Swap 4
Derivative [Line Items]
Notional amount of derivative | zł				zł 2,999.5
Notional amount due from counterparty | UPC Holding | Cross-Currency Swap 5
Derivative [Line Items]
Notional amount of derivative		777.0
Notional amount due from counterparty | UPC Holding | Cross-Currency Swap 6
Derivative [Line Items]
Notional amount of derivative | SFr			SFr 740.0
Notional amount due from counterparty | Telenet | Cross-Currency Swap 7
Derivative [Line Items]
Notional amount of derivative | $	3,940.0
Notional amount due from counterparty | Telenet | Cross-Currency Swap 8
Derivative [Line Items]
Notional amount of derivative		45.2
Notional amount due to counterparty | UPC Holding | Cross-Currency Swap 1
Derivative [Line Items]
Notional amount of derivative		318.1
Notional amount due to counterparty | UPC Holding | Cross-Currency Swap 2
Derivative [Line Items]
Notional amount of derivative | SFr			4,256.9
Notional amount due to counterparty | UPC Holding | Cross-Currency Swap 3
Derivative [Line Items]
Notional amount of derivative | SFr			SFr 2,970.1
Notional amount due to counterparty | UPC Holding | Cross-Currency Swap 4
Derivative [Line Items]
Notional amount of derivative		653.5
Notional amount due to counterparty | UPC Holding | Cross-Currency Swap 5
Derivative [Line Items]
Notional amount of derivative | zł				zł 3,302.9
Notional amount due to counterparty | UPC Holding | Cross-Currency Swap 6
Derivative [Line Items]
Notional amount of derivative		701.1
Notional amount due to counterparty | Telenet | Cross-Currency Swap 7
Derivative [Line Items]
Notional amount of derivative		€ 3,489.6
Notional amount due to counterparty | Telenet | Cross-Currency Swap 8
Derivative [Line Items]
Notional amount of derivative | $	$ 50.0