Earnings or Loss per Ordinary Share Schedule of calculations of our basic and diluted earnings per share (EPS) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Numerator:
Net earnings (loss) attributable to Liberty Global shareholders (basic and diluted EPS computation)	$ 157.1	$ (830.1)	$ (171.6)	$ (842.7)
Denominator:
Weighted average common shares (basic EPS computation) (in shares)	779,708,147	796,152,814	784,112,867	632,698,780
Incremental shares attributable to the assumed exercise of outstanding options and SARs and the release of restricted shares and share units upon vesting (treasury stock method) (in shares)	10,378,194	0	0	0
Weighted average common shares (diluted EPS computation) (in shares)	790,086,341	796,152,814	784,112,867	632,698,780