Subsequent Events (Details)	1 Months Ended
	Oct. 31, 2019 EUR (€)	Oct. 31, 2019 USD ($)	Oct. 31, 2019 GBP (£)	Oct. 31, 2019 USD ($)	Oct. 31, 2019 GBP (£)	Aug. 31, 2019 USD ($)	Aug. 31, 2019 GBP (£)	Jul. 31, 2019 USD ($)	May 31, 2019 USD ($)	May 31, 2019 GBP (£)
Senior Notes | VM Dollar Senior Secured Notes
Subsequent Event [Line Items]
Principal amount of debt								$ 600,000,000.0	$ 825,000,000.0
Senior Notes | VM Sterling Senior Secured Notes
Subsequent Event [Line Items]
Principal amount of debt						$ 49,200,000	£ 40,000,000.0		$ 368,700,000	£ 300,000,000.0
Subsequent Event | VM Credit Facilities
Subsequent Event [Line Items]
Extinguishment of debt		$ 3,400,000,000.0
Subsequent Event | VM Dollar Senior Secured Notes
Subsequent Event [Line Items]
Extinguishment of debt		1,000,000,000.0
Subsequent Event | VM Sterling Senior Secured Notes
Subsequent Event [Line Items]
Extinguishment of debt		368,700,000	£ 300,000,000.0
Subsequent Event | Telenet Credit Facility
Subsequent Event [Line Items]
Extinguishment of debt	€ 371,000,000.0	$ 404,500,000
Subsequent Event | Medium-term Notes | VM Dollar-Denominated Term Loan Facility
Subsequent Event [Line Items]
Principal amount of debt				$ 3,300,000,000.0
Subsequent Event | Medium-term Notes | VM Euro-Denominated Term Loan Facility
Subsequent Event [Line Items]
Principal amount of debt	750,000,000.0			817,700,000
Subsequent Event | Medium-term Notes | Telenet Dollar-Denominated Term Loan Facility
Subsequent Event [Line Items]
Principal amount of debt				220,000,000.0
Subsequent Event | Medium-term Notes | Telenet Euro-Denominated Term Loan Facility
Subsequent Event [Line Items]
Principal amount of debt	€ 175,000,000.0			190,800,000
Subsequent Event | Senior Notes | VM Sterling-Denominated Term Loan Facility
Subsequent Event [Line Items]
Principal amount of debt				$ 491,600,000	£ 400,000,000.0