Exercise price of the option.

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Exercise price of the warrants.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Price of a single share of a number of saleable stocks of a company.

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-Name Regulation S-X (SX)

-Number 210

-Section 04

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Equity (Call Option Contracts and Other Transactions) (Details) In Millions, except Share data, unless otherwise specified	0 Months Ended								3 Months Ended
	Feb. 01, 2013 Telenet Self-Tender [Member] USD ($)	Feb. 01, 2013 Telenet Self-Tender [Member] EUR (€)	Dec. 17, 2012 Warrant Range One [Member] USD ($)	Dec. 17, 2012 Warrant Range One [Member] EUR (€)	Dec. 17, 2012 Warrant Range Two [Member] USD ($)	Dec. 17, 2012 Warrant Range Two [Member] EUR (€)	Dec. 17, 2012 Minimum [Member] Telenet Self-Tender [Member] EUR (€)	Dec. 17, 2012 Maximum [Member] Telenet Self-Tender [Member] USD ($)	Mar. 31, 2013 Call Option [Member] Class A Ordinary Shares [Member] USD ($)
Class of Stock [Line Items]
Call options, exercise price (in dollars per share)									$ 0
Share price (in dollar/euro per share)							€ 35	$ 42.35
Warrants (in dollars per share)			$ 16.31	€ 13.48	$ 30.82	€ 25.47
Use of restricted cash to fund transaction	$ 454.6	€ 332.5
Shares purchased pursuant to repurchase programs (in shares)	9,497,637	9,497,637
Percentage ownership in subsidiary	58.40%	58.40%
Warrants (in shares)	3,000	3,000