Derivative Instruments - Interest Rate Derivative Contracts (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Foreign currency forward contracts
Derivative [Line Items]
Notional amount of derivative	$ 135.0
Weighted average remaining life	4 months 24 days
Interest Rate Swap | C&W
Derivative [Line Items]
Notional amount of derivative	$ 2,555.0
Weighted average remaining life	4 years 3 months 18 days
Interest Rate Swap | VTR Finance
Derivative [Line Items]
Notional amount of derivative	$ 187.4
Weighted average remaining life	3 years 1 month 6 days
Interest Rate Swap | Liberty Puerto Rico
Derivative [Line Items]
Notional amount of derivative	$ 1,000.0
Weighted average remaining life	6 years 7 months 6 days
Interest Rate Swap | Cabletica
Derivative [Line Items]
Notional amount of derivative	$ 53.5
Weighted average remaining life	3 years 6 months
Basis Swap | C&W
Derivative [Line Items]
Notional amount of derivative	$ 2,340.0
Weighted average remaining life	24 days
Basis Swap | Liberty Puerto Rico
Derivative [Line Items]
Notional amount of derivative	$ 1,590.0
Weighted average remaining life	21 days