Debt (Components of Debt) (Details) € in Millions, $ in Millions	Sep. 30, 2023 USD ($)	Sep. 30, 2023 EUR (€)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Weighted average interest rate	6.13%	6.13%
Unused borrowing capacity, amount	$ 1,542.6
Total debt before deferred financing costs, discounts and premiums	15,289.9		$ 13,370.2
Deferred financing costs, discounts and premiums, net	(154.4)		(43.1)
Total carrying amount of debt	15,135.5		13,327.1
Finance lease obligations	56.1		436.1
Total debt and finance lease obligations	15,191.6		13,763.2
Current portion of debt and finance lease obligations	(633.3)		(799.7)
Long-term debt and finance lease obligations	$ 14,558.3		12,963.5
UPC Holding Bank Facility
Debt Instrument [Line Items]
Weighted average interest rate	7.66%	7.66%
Total debt before deferred financing costs, discounts and premiums	$ 3,573.2		3,587.7
UPC Holding Bank Facility | UPC Revolving Facility
Debt Instrument [Line Items]
Unused borrowing capacity, amount	$ 754.6	€ 713.4
UPC SPE Notes
Debt Instrument [Line Items]
Weighted average interest rate	4.57%	4.57%
Total debt before deferred financing costs, discounts and premiums	$ 1,646.6		1,651.6
UPC Holding Senior Notes
Debt Instrument [Line Items]
Weighted average interest rate	4.78%	4.78%
Total debt before deferred financing costs, discounts and premiums	$ 809.7		814.2
Telenet Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate	6.98%	6.98%
Total debt before deferred financing costs, discounts and premiums	$ 3,469.1		3,483.9
Telenet Credit Facility | UPC Revolving Facility
Debt Instrument [Line Items]
Unused borrowing capacity, amount	$ 682.2	€ 645.0
Telenet Senior Secured Notes
Debt Instrument [Line Items]
Weighted average interest rate	4.77%	4.77%
Total debt before deferred financing costs, discounts and premiums	$ 1,571.1		1,578.4
VM Ireland Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate	7.31%	7.31%
Unused borrowing capacity, amount	$ 105.8	€ 100.0
Total debt before deferred financing costs, discounts and premiums	952.0		963.9
VM Ireland Credit Facility | UPC Revolving Facility
Debt Instrument [Line Items]
Unused borrowing capacity, amount	$ 105.8	€ 100.0
Vodafone Collar Loan
Debt Instrument [Line Items]
Weighted average interest rate	2.95%	2.95%
Total debt before deferred financing costs, discounts and premiums	$ 1,330.7		0.0
LGBH Facility B
Debt Instrument [Line Items]
Weighted average interest rate	7.85%	7.85%
Total debt before deferred financing costs, discounts and premiums	$ 859.4		0.0
Vendor financing
Debt Instrument [Line Items]
Weighted average interest rate	4.96%	4.96%
Total debt before deferred financing costs, discounts and premiums	$ 611.2		704.7	$ 660.8	$ 843.2
Other
Debt Instrument [Line Items]
Weighted average interest rate	5.57%	5.57%
Total debt before deferred financing costs, discounts and premiums	$ 466.9		$ 585.8