Income Taxes (Reconciliation of Federal to Effective Taxes) (Schedule) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Accrued Income Taxes [Abstract]
Computed “expected” tax benefit (expense) (a)	$ (47.1)	[1]	$ 71.1	[1]	$ (56.8)	[1]	$ 69.7	[1]
Loss of subsidiary tax attributes due to a deemed change in control	(91.4)		0		(91.4)		0
Non-deductible or non-taxable interest and other expenses	(48.5)		(24.6)		(82.7)		(36.9)
International rate differences (b)	28.9	[2]	(21.0)	[2]	42.4	[2]	(19.1)	[2]
Basis and other differences in the treatment of items associated with investments in subsidiaries and affiliates	(44.2)		7.9		(29.2)		(6.0)
Non-deductible or non-taxable foreign currency exchange results	12.7		(1.6)		10.2		(1.6)
Enacted tax law and rate changes	(8.0)		0.4		(8.7)		(0.2)
Tax effect of intercompany financing	7.4		0		7.4		0
Change in valuation allowances	1.4		(40.6)		(0.5)		(43.3)
Other, net	(7.1)		(3.4)		(7.1)		(7.5)
Total	$ (195.9)		$ (11.8)		$ (216.4)		$ (44.9)

[1] As a result of the Virgin Media Acquisition, pursuant to which Liberty Global became the publicly-held parent company of the successors by merger of LGI and Virgin Media, our statutory tax rate changed from the U.S. federal income tax rate of 35% to the U.K. statutory income tax rate of 23%. Accordingly, the statutory or “expected” tax rates used in this table are 23% for the 2013 periods and 35% for the 2012 periods.

[2] Amounts reflect statutory rates in jurisdictions in which we operate outside of the U.K. for the 2013 periods and outside of the U.S. for the 2012 periods.