Acquisitions and Discontinued Operation (Disposal Group) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	$ 26.6	$ 95.8
Chellomedia [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating income (loss)	0.6	(2.8)
Earnings before income taxes and noncontrolling interests	0.9	1.9
Income tax expense	(0.1)	(0.1)
Earnings from discontinued operation attributable to Liberty Global shareholders, net of taxes	$ 0.8	$ 1.9