Condensed Consolidated Statements of Comprehensive Earnings (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 175.7	$ (821.6)	$ (144.8)	$ (791.0)
Other comprehensive earnings (loss), net of taxes:
Foreign currency translation adjustments	(788.9)	1,068.8	(313.9)	589.5
Reclassification adjustments included in net earnings (loss) (note 3)	0.3	0	64.5	0.2
Other	(0.1)	0	(0.1)	0.2
Other comprehensive earnings (loss)	(788.7)	1,068.8	(249.5)	589.9
Comprehensive earnings (loss)	(613.0)	247.2	(394.3)	(201.1)
Comprehensive earnings attributable to noncontrolling interests	(18.7)	(5.5)	(27.1)	(43.0)
Comprehensive earnings (loss) attributable to Liberty Global shareholders	$ (631.7)	$ 241.7	$ (421.4)	$ (244.1)