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Investments (Narrative) (Details) $ in Millions, € in Billions		1 Months Ended	3 Months Ended		12 Months Ended
	Jun. 01, 2021	Jul. 31, 2022	Dec. 31, 2022 USD ($)	Dec. 31, 2022 EUR (€)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2022 EUR (€)
Schedule of Investments [Line Items]
Dividend distributions received from the VMO2 JV					$ 477.9	$ 0.0	$ 0.0
Revenue					7,195.7	10,311.3	11,545.4
Investments measured at fair value			$ 4,800.6		4,800.6	5,027.4
Proceeds from sale of debt securities					9,100.0	6,100.0	6,000.0
Realized net gains (losses)					(6.9)	(2.0)	2.0
2022 VMO2 Long-term Incentive Plan
Schedule of Investments [Line Items]
Long term incentive plan, performance period		3 years
Vesting percentage		66.70%
Fair value of ventures incentive plan awards			$ 10.9		$ 10.9
Long term incentive plan, percentage of payout liability owed by each joint venture					50.00%
VMO2 JV
Schedule of Investments [Line Items]
Co-venturer ownership percentage	50.00%		50.00%		50.00%			50.00%
Proceeds from equity method investment					$ 932.5
Dividend distributions received from the VMO2 JV					477.9
Dividends received					454.6	214.8	0.0
Due from related parties			$ 37.0		37.0	43.3
Goodwill, impairment loss			3,600.0	€ 3.1
Investments measured at fair value			$ 40,300.0		$ 40,300.0			€ 33.3
Ownership percentage	50.00%		50.00%		50.00%			50.00%
VMO2 JV \| Minimum
Schedule of Investments [Line Items]
Leverage ratio	4.0
Service period	2 years
VMO2 JV \| Maximum
Schedule of Investments [Line Items]
Leverage ratio	5.0
Service period	6 years
VMO2 JV \| Telefónica
Schedule of Investments [Line Items]
Co-venturer ownership percentage	50.00%
VMO2 JV \| Liberty Global
Schedule of Investments [Line Items]
Co-venturer ownership percentage	50.00%
UK JV Services
Schedule of Investments [Line Items]
Revenue					$ 251.2	170.1
VodafoneZiggo JV
Schedule of Investments [Line Items]
Co-venturer ownership percentage			50.00%		50.00%			50.00%
Dividend distributions received from the VMO2 JV					$ 266.6	311.7	249.5
Dividends received					$ 266.6	311.7	249.5
Ownership percentage			50.00%		50.00%			50.00%
Term to distribute all unrestricted cash					2 months
VodafoneZiggo JV \| Equity Method Investee
Schedule of Investments [Line Items]
Due from related parties			$ 35.0		$ 35.0	62.5
VodafoneZiggo JV \| Minimum
Schedule of Investments [Line Items]
Leverage ratio			4.5		4.5			4.5
VodafoneZiggo JV \| Maximum
Schedule of Investments [Line Items]
Leverage ratio			5.0		5.0			5.0
JV Services
Schedule of Investments [Line Items]
Revenue					$ 263.9	$ 222.0	$ 178.9