Debt and Capital Lease Obligations (Components of Debt and Capital Lease Obligations) (Details)	1 Months Ended	6 Months Ended
	Feb. 29, 2016 EUR (€)	Jun. 30, 2016 GBP (£)	Jun. 30, 2016 EUR (€)	Jun. 30, 2016 USD ($)	Feb. 29, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 CLP
Debt Instrument [Line Items]
Total debt before unamortized premiums, discounts and deferred financing costs				$ 50,599,900,000		$ 45,781,200,000
Unamortized premiums (discounts), net				70,200,000		(46,700,000)
Unamortized deferred financing costs				(337,600,000)		(308,200,000)
Total debt				50,332,500,000		45,426,300,000
Capital lease obligations				1,311,500,000		1,322,800,000
Total debt and capital lease obligations				51,644,000,000		46,749,100,000
Current maturities of debt and capital lease obligations				(2,143,300,000)		(2,537,900,000)
Long-term debt and capital lease obligations				49,500,700,000		44,211,200,000
Debt fair value				275,800,000
Significant other observable inputs (Level 2)
Debt Instrument [Line Items]
Debt fair value				185,000,000
Unitymedia [Member]
Debt Instrument [Line Items]
Limitation on availability			€ 99,700,000.0	110,400,000
Virgin Media [Member]
Debt Instrument [Line Items]
Limitation on availability		£ 549,000,000		728,400,000
Ziggo Group Holding [Member]
Debt Instrument [Line Items]
Limitation on availability			95,200,000.0	105,400,000
Loans receivable			€ 100,000,000	$ 110,700,000
Ziggo Secured Finance [Member]
Debt Instrument [Line Items]
Ownership percentage of special purpose financing entity		100.00%	100.00%	100.00%
VM Notes [Member]
Debt Instrument [Line Items]
Weighted average interest rate		5.60%	5.60%	5.60%
Unused borrowing capacity		£ 0		$ 0
Estimated fair value				10,711,000,000		10,594,100,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 10,750,200,000		10,551,500,000
VM Credit Facility [Member]
Debt Instrument [Line Items]
Weighted average interest rate		3.79%	3.79%	3.79%
Unused borrowing capacity				$ 895,600,000
Estimated fair value				3,159,200,000		3,413,700,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 3,225,400,000		3,471,100,000
Ziggo Credit Facility [Member]
Debt Instrument [Line Items]
Weighted average interest rate		3.68%	3.68%	3.68%
Unused borrowing capacity			€ 800,000,000	$ 885,800,000
Estimated fair value				5,140,200,000		5,161,000,000
Total debt before unamortized premiums, discounts and deferred financing costs				5,217,000,000		5,272,000,000
Limitation on availability			€ 438,100,000.0	$ 485,100,000
Ziggo SPE Notes [Member]
Debt Instrument [Line Items]
Weighted average interest rate		4.47%	4.47%	4.47%
Unused borrowing capacity			€ 0	$ 0
Estimated fair value				1,680,800,000		1,582,700,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 1,728,800,000		1,703,900,000
Ziggo Notes [Member]
Debt Instrument [Line Items]
Weighted average interest rate		6.82%	6.82%	6.82%
Unused borrowing capacity			€ 0	$ 0
Estimated fair value				992,400,000		955,100,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 902,300,000		885,400,000
Unitymedia Notes [Member]
Debt Instrument [Line Items]
Weighted average interest rate		5.00%	5.00%	5.00%
Unused borrowing capacity			€ 0	$ 0
Estimated fair value				7,809,100,000		7,631,600,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 7,667,000,000		7,682,000,000
Unitymedia Revolving Credit Facilities [Member]
Debt Instrument [Line Items]
Weighted average interest rate		0.00%	0.00%	0.00%
Unused borrowing capacity			€ 500,000,000	$ 553,600,000
Estimated fair value				0		0
Total debt before unamortized premiums, discounts and deferred financing costs				0		0
Limitation on availability			€ 500,000,000	$ 553,600,000
UPCB SPE Notes Debt [Member]
Debt Instrument [Line Items]
Weighted average interest rate		5.81%	5.81%	5.81%
Unused borrowing capacity			€ 0	$ 0
Estimated fair value				3,185,900,000		3,131,700,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 3,154,400,000		3,142,000,000
UPC Broadband Holding Bank Facility [Member]
Debt Instrument [Line Items]
Weighted average interest rate		3.34%	3.34%	3.34%
Unused borrowing capacity			€ 990,100,000	$ 1,096,300,000
Estimated fair value				1,278,600,000		1,284,300,000
Total debt before unamortized premiums, discounts and deferred financing costs				1,305,000,000		1,305,000,000
Limitation on availability			€ 685,300,000.0	758,800,000
VM Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Facility amount		£ 675,000,000		$ 895,600,000
UPC Holding Senior Notes [Member]
Debt Instrument [Line Items]
Weighted average interest rate		6.59%	6.59%	6.59%
Unused borrowing capacity			€ 0	$ 0
Estimated fair value				1,627,600,000		1,601,400,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 1,520,800,000		1,491,100,000
Telenet Credit Facility [Member]
Debt Instrument [Line Items]
Weighted average interest rate		3.41%	3.41%	3.41%
Unused borrowing capacity			€ 381,000,000	$ 421,900,000
Estimated fair value				3,327,400,000		1,443,000,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 3,371,400,000		1,474,500,000
Telenet SPE Notes [Member]
Debt Instrument [Line Items]
Weighted average interest rate		5.76%	5.76%	5.76%
Unused borrowing capacity			€ 0	$ 0
Estimated fair value				1,439,300,000		2,155,800,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 1,362,000,000		2,097,200,000
VTR Senior Secured Notes [Member]
Debt Instrument [Line Items]
Weighted average interest rate		6.88%	6.88%	6.88%
Unused borrowing capacity			€ 0	$ 0
Estimated fair value				1,403,500,000		1,301,100,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 1,400,000,000		1,400,000,000
VTR Credit Facility [Member]
Debt Instrument [Line Items]
Weighted average interest rate		0.00%	0.00%	0.00%
Unused borrowing capacity				$ 193,300,000
Estimated fair value				0		0
Total debt before unamortized premiums, discounts and deferred financing costs				$ 0		0
VTR Credit Facility [Member]
Debt Instrument [Line Items]
Facility amount						33,300,000	CLP 22,000,000,000
Sumitomo Collar Loan [Member]
Debt Instrument [Line Items]
Weighted average interest rate		1.88%	1.88%	1.88%
Unused borrowing capacity			€ 0	$ 0
Estimated fair value				750,200,000		805,600,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 734,800,000		787,600,000
ITV Collar Loan [Member]
Debt Instrument [Line Items]
Weighted average interest rate		1.35%	1.35%	1.35%
Unused borrowing capacity				$ 0
Estimated fair value				1,421,000,000		1,547,900,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 1,436,100,000		1,594,700,000
Liberty Puerto Rico Bank Facility [Member]
Debt Instrument [Line Items]
Weighted average interest rate		5.11%	5.11%	5.11%
Unused borrowing capacity				$ 40,000,000
Estimated fair value				899,200,000		913,000,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 942,500,000		942,500,000
Vendor Financing [Member]
Debt Instrument [Line Items]
General term of vendor financing arrangements		1 year
VTR Dollar Credit Facility [Member]
Debt Instrument [Line Items]
Facility amount						160,000,000
Other Debt [Member]
Debt Instrument [Line Items]
Weighted average interest rate		5.51%	5.51%	5.51%
Unused borrowing capacity				$ 0
Estimated fair value				716,700,000		395,000,000
Total debt before unamortized premiums, discounts and deferred financing costs				633,800,000		291,800,000
Sumitomo Share Loan [Member]
Debt Instrument [Line Items]
Total debt before unamortized premiums, discounts and deferred financing costs				$ 90,800,000
CWC Notes [Member]
Debt Instrument [Line Items]
Weighted average interest rate		7.31%	7.31%	7.31%
Unused borrowing capacity			€ 0	$ 0
Estimated fair value				2,275,400,000		0
Total debt before unamortized premiums, discounts and deferred financing costs				$ 2,194,600,000		0
CWC Credit Facilities [Member]
Debt Instrument [Line Items]
Weighted average interest rate		4.71%	4.71%	4.71%
Unused borrowing capacity			€ 310,000,000	$ 310,000,000
Estimated fair value				1,356,900,000		0
Total debt before unamortized premiums, discounts and deferred financing costs				1,364,500,000		0
Limitation on availability				$ 177,300,000.0
Aggregate Variable and Fixed Rate Indebtedness [Member]
Debt Instrument [Line Items]
Weighted average interest rate		4.90%	4.90%	4.90%
Telenet Credit Facility Z [Member]
Debt Instrument [Line Items]
Facility amount	€ 200,000,000				$ 221,500,000
Telenet Credit Facility AA [Member]
Debt Instrument [Line Items]
Facility amount	800,000,000				885,800,000
Telenet Credit Facility X [Member]
Debt Instrument [Line Items]
Carrying value	€ 217,000,000				$ 240,300,000
Third-Party Debt [Member]
Debt Instrument [Line Items]
Weighted average interest rate		4.85%	4.85%	4.85%
Unused borrowing capacity				$ 4,396,500,000
Estimated fair value				50,863,700,000		45,605,900,000
VM Facility G [Member]
Debt Instrument [Line Items]
Facility amount			€ 75,000,000	83,000,000
VM Facility H [Member]
Debt Instrument [Line Items]
Facility amount			€ 25,000,000	$ 27,700,000
Liberty Global Group [Member]
Debt Instrument [Line Items]
Weighted average interest rate		4.66%	4.66%	4.66%
Unused borrowing capacity				$ 3,853,200,000
Estimated fair value				44,911,200,000		43,391,800,000
Total debt before unamortized premiums, discounts and deferred financing costs				44,680,800,000		43,438,700,000
Unamortized premiums (discounts), net				(27,100,000)
Unamortized deferred financing costs				(295,100,000)
Capital lease obligations				1,297,700,000		1,321,900,000
Liberty Global Group [Member] | UnityMedia KabelBW [Member]
Debt Instrument [Line Items]
Capital lease obligations				703,300,000		703,100,000
Liberty Global Group [Member] | Unitymedia [Member]
Debt Instrument [Line Items]
Unamortized premiums (discounts), net				0
Unamortized deferred financing costs				(54,700,000)
Liberty Global Group [Member] | Virgin Media [Member]
Debt Instrument [Line Items]
Unamortized premiums (discounts), net				13,900,000
Unamortized deferred financing costs				(119,800,000)
Capital lease obligations				116,700,000		159,500,000
Liberty Global Group [Member] | Telenet [Member]
Debt Instrument [Line Items]
Unamortized premiums (discounts), net				(6,800,000)
Unamortized deferred financing costs				(55,300,000)
Capital lease obligations				388,900,000		371,100,000
Liberty Global Group [Member] | Ziggo Group Holding [Member]
Debt Instrument [Line Items]
Unamortized premiums (discounts), net				26,200,000
Unamortized deferred financing costs				(28,600,000)
Liberty Global Group [Member] | Other Subsidiaries [Member]
Debt Instrument [Line Items]
Unamortized premiums (discounts), net				(52,300,000)
Unamortized deferred financing costs				(1,100,000)
Capital lease obligations				$ 88,800,000		88,200,000
Liberty Global Group [Member] | Vendor Financing [Member]
Debt Instrument [Line Items]
Weighted average interest rate		3.33%	3.33%	3.33%
Unused borrowing capacity				$ 0
Estimated fair value				1,671,800,000		1,688,900,000
Total debt before unamortized premiums, discounts and deferred financing costs				$ 1,671,800,000		1,688,900,000
Liberty Global Group [Member] | Aggregate Variable and Fixed Rate Indebtedness [Member]
Debt Instrument [Line Items]
Weighted average interest rate		4.70%	4.70%	4.70%
LiLAC Group [Member]
Debt Instrument [Line Items]
Weighted average interest rate		6.25%	6.25%	6.25%
Unused borrowing capacity				$ 543,300,000
Estimated fair value				5,952,500,000		2,214,100,000
Total debt before unamortized premiums, discounts and deferred financing costs				5,919,100,000		2,342,500,000
Unamortized premiums (discounts), net				97,300,000
Unamortized deferred financing costs				(42,500,000)
Capital lease obligations				13,800,000		900,000
LiLAC Group [Member] | CWC [Member]
Debt Instrument [Line Items]
Unamortized premiums (discounts), net				105,300,000
Unamortized deferred financing costs				(8,200,000)
Capital lease obligations				13,100,000		0
LiLAC Group [Member] | Liberty Puerto Rico [Member]
Debt Instrument [Line Items]
Unamortized premiums (discounts), net				(8,000,000)
Unamortized deferred financing costs				(8,400,000)
Capital lease obligations				300,000		600,000
LiLAC Group [Member] | VTR [Member]
Debt Instrument [Line Items]
Unamortized premiums (discounts), net				0
Unamortized deferred financing costs				(25,900,000)
Capital lease obligations				$ 400,000		300,000
LiLAC Group [Member] | Vendor Financing [Member]
Debt Instrument [Line Items]
Weighted average interest rate		6.00%	6.00%	6.00%
Unused borrowing capacity				$ 0
Estimated fair value				17,500,000		0
Total debt before unamortized premiums, discounts and deferred financing costs				$ 17,500,000		$ 0
LiLAC Group [Member] | Aggregate Variable and Fixed Rate Indebtedness [Member]
Debt Instrument [Line Items]
Weighted average interest rate		6.50%	6.50%	6.50%
Pro Forma [Member] | Unitymedia [Member]
Debt Instrument [Line Items]
Limitation on availability			€ 52,600,000.0	$ 58,200,000
Pro Forma [Member] | Virgin Media [Member]
Debt Instrument [Line Items]
Limitation on availability		£ 457,500,000.0		607,000,000
Pro Forma [Member] | Ziggo Group Holding [Member]
Debt Instrument [Line Items]
Limitation on availability			0	0
Pro Forma [Member] | Ziggo Credit Facility [Member]
Debt Instrument [Line Items]
Limitation on availability			0	0
Pro Forma [Member] | Unitymedia Revolving Credit Facilities [Member]
Debt Instrument [Line Items]
Limitation on availability			470,100,000.0	520,500,000
Pro Forma [Member] | UPC Broadband Holding Bank Facility [Member]
Debt Instrument [Line Items]
Limitation on availability			€ 624,000,000	691,000,000
Pro Forma [Member] | CWC Credit Facilities [Member]
Debt Instrument [Line Items]
Limitation on availability				$ 177,300,000.0
EURIBOR [Member] | Telenet Credit Facility Z [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
EURIBOR [Member] | Telenet Credit Facility AA [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	3.50%
EURIBOR [Member] | Telenet Credit Facility X [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%
EURIBOR [Member] | VM Facility G [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		3.00%
Floor rate		0.75%	0.75%	0.75%
EURIBOR [Member] | VM Facility H [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		3.75%
Floor rate		0.00%	0.00%	0.00%