Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Debt and Capital Lease Obligations (Unitymedia KabelBW Senior Notes Details of Borrowings) (Schedule) (Details) € in Millions, $ in Millions	Dec. 31, 2014 EUR (€)	Dec. 31, 2014 USD ($)	Dec. 17, 2014	Oct. 22, 2014	Dec. 31, 2013 USD ($)	Nov. 21, 2013	Apr. 16, 2013	Jan. 21, 2013	Dec. 14, 2012	Sep. 19, 2012
Debt Instrument [Line Items]
Principal amount outstanding		$ 44,612.2
Estimated fair value		46,151.1			$ 44,229.0
Carrying value		44,611.4			42,856.0
Unitymedia KabelBW Notes [Member]
Debt Instrument [Line Items]
Principal amount outstanding		7,402.5
Estimated fair value		7,869.3			8,058.2
Carrying value		$ 7,400.9			$ 7,651.9
UM Senior Exchange Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt	9.50%	9.50%
Principal amount outstanding	€ 618.0	$ 747.7
Estimated fair value		837.9
Carrying value		$ 746.1
September 2012 UM Senior Secured Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt	5.50%	5.50%								5.50%
Principal amount outstanding	€ 650.0	$ 786.5
Estimated fair value		843.5
Carrying value		$ 786.5
December 2012 UM Dollar Senior Secured Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt	5.50%	5.50%							5.50%
Principal amount outstanding		$ 1,000.0
Estimated fair value		1,046.3
Carrying value		$ 1,000.0
December 2012 UM Euro Senior Secured Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt	5.75%	5.75%							5.75%
Principal amount outstanding	€ 500.0	$ 605.0
Estimated fair value		657.9
Carrying value		$ 605.0
January 2013 UM Senior Secured Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt	5.125%	5.125%						5.125%
Principal amount outstanding	€ 500.0	$ 605.0
Estimated fair value		646.6
Carrying value		$ 605.0
April 2013 UM Senior Secured Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt	5.625%	5.625%					5.625%
Principal amount outstanding	€ 350.0	$ 423.5
Estimated fair value		461.1
Carrying value		$ 423.5
November 2013 UM Senior Secured Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt	6.25%	6.25%				6.25%
Principal amount outstanding	€ 475.0	$ 574.8
Estimated fair value		654.5
Carrying value		$ 574.8
October 2014 UM Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt	6.125%	6.125%		6.125%
Principal amount outstanding	€ 900.0	$ 900.0
Estimated fair value		932.6
Carrying value		$ 900.0
December 2014 UM Euro Senior Secured Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt	4.00%	4.00%	4.00%
Principal amount outstanding	€ 1,000.0	$ 1,210.0
Estimated fair value		1,237.2
Carrying value		$ 1,210.0
December 2014 UM Dollar Senior Secured Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt	5.00%	5.00%	5.00%
Principal amount outstanding		$ 550.0
Estimated fair value		551.7
Carrying value		$ 550.0