Share-based Compensation (Schedule of Stock Award Activity, Options, SARs & PSARs) (Details) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($) $ / shares shares
Liberty Global Group [Member] | Employee Stock Option [Member] | Class A Ordinary Shares [Member]
Number of shares
Options outstanding at beginning of period (in shares) | shares	873,333
Options granted (in shares) | shares	79,899
Options cancelled/forfeited (in shares) | shares	(9,328)
Options exercised (in shares) | shares	(207,034)
Options outstanding at end of period (in shares) | shares	736,870
Options exercisable at end of period (in shares) | shares	499,248
Weighted average exercise price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 22.85
Options granted (in dollars per shares) | $ / shares	36.06
Options cancelled/forfeited (in dollars per share) | $ / shares	34.59
Options exercised (in dollars per shares) | $ / shares	20.99
Options outstanding at end of period (in dollars per shares) | $ / shares	24.66
Options exercisable at end of period (in dollars per shares) | $ / shares	$ 20.58
Weighted average remaining contractual term, in years
Options outstanding at end of period	4 years 6 months
Options exercisable at end of period	3 years 8 months 12 days
Total intrinsic value of awards exercised (in millions):
Options outstanding at end of period | $	$ 6.0
Options exercisable at end of period | $	$ 5.4
Liberty Global Group [Member] | Employee Stock Option [Member] | Class C Ordinary Shares [Member]
Number of shares
Options outstanding at beginning of period (in shares) | shares	2,738,536
Options granted (in shares) | shares	159,798
Options cancelled/forfeited (in shares) | shares	(51,787)
Options exercised (in shares) | shares	(541,147)
Options outstanding at end of period (in shares) | shares	2,305,400
Options exercisable at end of period (in shares) | shares	1,304,011
Weighted average exercise price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 23.98
Options granted (in dollars per shares) | $ / shares	35.15
Options cancelled/forfeited (in dollars per share) | $ / shares	35.07
Options exercised (in dollars per shares) | $ / shares	19.40
Options outstanding at end of period (in dollars per shares) | $ / shares	25.58
Options exercisable at end of period (in dollars per shares) | $ / shares	$ 19.05
Weighted average remaining contractual term, in years
Options outstanding at end of period	5 years 3 months 18 days
Options exercisable at end of period	3 years 6 months
Total intrinsic value of awards exercised (in millions):
Options outstanding at end of period | $	$ 16.4
Options exercisable at end of period | $	$ 14.6
Liberty Global Group [Member] | Stock Appreciation Rights (SARs) [Member] | Class A Ordinary Shares [Member]
Number of shares
Options outstanding at beginning of period (in shares) | shares	7,693,152
Options granted (in shares) | shares	2,641,914
Options cancelled/forfeited (in shares) | shares	(123,302)
Options exercised (in shares) | shares	(336,732)
Options outstanding at end of period (in shares) | shares	9,875,032
Options exercisable at end of period (in shares) | shares	4,136,581
Weighted average exercise price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 34.89
Options granted (in dollars per shares) | $ / shares	37.73
Options cancelled/forfeited (in dollars per share) | $ / shares	43.48
Options exercised (in dollars per shares) | $ / shares	11.64
Options outstanding at end of period (in dollars per shares) | $ / shares	36.34
Options exercisable at end of period (in dollars per shares) | $ / shares	$ 30.20
Weighted average remaining contractual term, in years
Options outstanding at end of period	4 years 10 months 24 days
Options exercisable at end of period	3 years 4 months 24 days
Total intrinsic value of awards exercised (in millions):
Options outstanding at end of period | $	$ 18.2
Options exercisable at end of period | $	$ 18.2
Liberty Global Group [Member] | Stock Appreciation Rights (SARs) [Member] | Class C Ordinary Shares [Member]
Number of shares
Options outstanding at beginning of period (in shares) | shares	18,685,347
Options granted (in shares) | shares	5,283,828
Options cancelled/forfeited (in shares) | shares	(256,622)
Options exercised (in shares) | shares	(995,103)
Options outstanding at end of period (in shares) | shares	22,717,450
Options exercisable at end of period (in shares) | shares	10,937,013
Weighted average exercise price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 31.70
Options granted (in dollars per shares) | $ / shares	36.60
Options cancelled/forfeited (in dollars per share) | $ / shares	41.60
Options exercised (in dollars per shares) | $ / shares	11.66
Options outstanding at end of period (in dollars per shares) | $ / shares	33.61
Options exercisable at end of period (in dollars per shares) | $ / shares	$ 27.51
Weighted average remaining contractual term, in years
Options outstanding at end of period	4 years 7 months 6 days
Options exercisable at end of period	3 years 2 months 12 days
Total intrinsic value of awards exercised (in millions):
Options outstanding at end of period | $	$ 55.6
Options exercisable at end of period | $	$ 55.5
Liberty Global Group [Member] | Performance Stock Appreciation Rights (PSARs) [Member] | Class A Ordinary Shares [Member]
Number of shares
Options outstanding at beginning of period (in shares) | shares	2,889,457
Options cancelled/forfeited (in shares) | shares	(657)
Options outstanding at end of period (in shares) | shares	2,888,800
Options exercisable at end of period (in shares) | shares	2,888,800
Weighted average exercise price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 31.93
Options cancelled/forfeited (in dollars per share) | $ / shares	31.87
Options outstanding at end of period (in dollars per shares) | $ / shares	31.93
Options exercisable at end of period (in dollars per shares) | $ / shares	$ 31.93
Weighted average remaining contractual term, in years
Options outstanding at end of period	4 years
Options exercisable at end of period	4 years
Total intrinsic value of awards exercised (in millions):
Options outstanding at end of period | $	$ 0.0
Options exercisable at end of period | $	$ 0.0
Liberty Global Group [Member] | Performance Stock Appreciation Rights (PSARs) [Member] | Class C Ordinary Shares [Member]
Number of shares
Options outstanding at beginning of period (in shares) | shares	8,629,481
Options cancelled/forfeited (in shares) | shares	(1,961)
Options outstanding at end of period (in shares) | shares	8,627,520
Options exercisable at end of period (in shares) | shares	8,672,520
Weighted average exercise price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 30.52
Options cancelled/forfeited (in dollars per share) | $ / shares	30.46
Options outstanding at end of period (in dollars per shares) | $ / shares	30.52
Options exercisable at end of period (in dollars per shares) | $ / shares	$ 30.52
Weighted average remaining contractual term, in years
Options outstanding at end of period	4 years
Options exercisable at end of period	4 years
Total intrinsic value of awards exercised (in millions):
Options outstanding at end of period | $	$ 0.0
Options exercisable at end of period | $	$ 0.0
LiLAC Group [Member] | Employee Stock Option [Member] | Class A Ordinary Shares [Member]
Number of shares
Options outstanding at beginning of period (in shares) | shares	21,233
Options granted (in shares) | shares	3,995
Options cancelled/forfeited (in shares) | shares	(238)
Options exercised (in shares) | shares	(1,312)
Options outstanding at end of period (in shares) | shares	23,678
Options exercisable at end of period (in shares) | shares	16,388
Weighted average exercise price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 24.29
Options granted (in dollars per shares) | $ / shares	37.16
Options cancelled/forfeited (in dollars per share) | $ / shares	43.84
Options exercised (in dollars per shares) | $ / shares	9.56
Options outstanding at end of period (in dollars per shares) | $ / shares	27.08
Options exercisable at end of period (in dollars per shares) | $ / shares	$ 21.45
Weighted average remaining contractual term, in years
Options outstanding at end of period	4 years 1 month 6 days
Options exercisable at end of period	3 years 2 months 12 days
Total intrinsic value of awards exercised (in millions):
Options outstanding at end of period | $	$ 0.2
Options exercisable at end of period | $	$ 0.2
LiLAC Group [Member] | Employee Stock Option [Member] | Class C Ordinary Shares [Member]
Number of shares
Options outstanding at beginning of period (in shares) | shares	57,742
Options granted (in shares) | shares	7,990
Options cancelled/forfeited (in shares) | shares	(474)
Options exercised (in shares) | shares	(4,439)
Options outstanding at end of period (in shares) | shares	60,819
Options exercisable at end of period (in shares) | shares	46,224
Weighted average exercise price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 22.42
Options granted (in dollars per shares) | $ / shares	38.67
Options cancelled/forfeited (in dollars per share) | $ / shares	43.91
Options exercised (in dollars per shares) | $ / shares	9.86
Options outstanding at end of period (in dollars per shares) | $ / shares	25.30
Options exercisable at end of period (in dollars per shares) | $ / shares	$ 20.43
Weighted average remaining contractual term, in years
Options outstanding at end of period	3 years 9 months 18 days
Options exercisable at end of period	3 years 1 month 6 days
Total intrinsic value of awards exercised (in millions):
Options outstanding at end of period | $	$ 0.0
Options exercisable at end of period | $	$ 0.6
LiLAC Group [Member] | Stock Appreciation Rights (SARs) [Member] | Class A Ordinary Shares [Member]
Number of shares
Options outstanding at beginning of period (in shares) | shares	233,192
Options granted (in shares) | shares	71,990
Options cancelled/forfeited (in shares) | shares	(1,963)
Options exercised (in shares) | shares	(6,852)
Options outstanding at end of period (in shares) | shares	296,367
Options exercisable at end of period (in shares) | shares	140,195
Weighted average exercise price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 31.07
Options granted (in dollars per shares) | $ / shares	37.53
Options cancelled/forfeited (in dollars per share) | $ / shares	39.57
Options exercised (in dollars per shares) | $ / shares	7.84
Options outstanding at end of period (in dollars per shares) | $ / shares	33.12
Options exercisable at end of period (in dollars per shares) | $ / shares	$ 26.72
Weighted average remaining contractual term, in years
Options outstanding at end of period	4 years 8 months 12 days
Options exercisable at end of period	3 years 2 months 12 days
Total intrinsic value of awards exercised (in millions):
Options outstanding at end of period | $	$ 1.0
Options exercisable at end of period | $	$ 1.0
LiLAC Group [Member] | Stock Appreciation Rights (SARs) [Member] | Class C Ordinary Shares [Member]
Number of shares
Options outstanding at beginning of period (in shares) | shares	579,273
Options granted (in shares) | shares	143,980
Options cancelled/forfeited (in shares) | shares	(4,173)
Options exercised (in shares) | shares	(19,413)
Options outstanding at end of period (in shares) | shares	699,667
Options exercisable at end of period (in shares) | shares	377,302
Weighted average exercise price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 29.73
Options granted (in dollars per shares) | $ / shares	40.61
Options cancelled/forfeited (in dollars per share) | $ / shares	39.81
Options exercised (in dollars per shares) | $ / shares	8.01
Options outstanding at end of period (in dollars per shares) | $ / shares	32.51
Options exercisable at end of period (in dollars per shares) | $ / shares	$ 25.79
Weighted average remaining contractual term, in years
Options outstanding at end of period	4 years 4 months 24 days
Options exercisable at end of period	3 years
Total intrinsic value of awards exercised (in millions):
Options outstanding at end of period | $	$ 3.1
Options exercisable at end of period | $	$ 3.1
LiLAC Group [Member] | Performance Stock Appreciation Rights (PSARs) [Member] | Class A Ordinary Shares [Member]
Number of shares
Options outstanding at beginning of period (in shares) | shares	140,127
Options cancelled/forfeited (in shares) | shares	(33)
Options outstanding at end of period (in shares) | shares	140,094
Options exercisable at end of period (in shares) | shares	140,094
Weighted average exercise price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 30.08
Options cancelled/forfeited (in dollars per share) | $ / shares	30.02
Options outstanding at end of period (in dollars per shares) | $ / shares	30.08
Options exercisable at end of period (in dollars per shares) | $ / shares	$ 30.08
Weighted average remaining contractual term, in years
Options outstanding at end of period	4 years
Options exercisable at end of period	4 years
Total intrinsic value of awards exercised (in millions):
Options outstanding at end of period | $	$ 0.3
Options exercisable at end of period | $	$ 0.3
LiLAC Group [Member] | Performance Stock Appreciation Rights (PSARs) [Member] | Class C Ordinary Shares [Member]
Number of shares
Options outstanding at beginning of period (in shares) | shares	418,492
Options cancelled/forfeited (in shares) | shares	(99)
Options outstanding at end of period (in shares) | shares	418,393
Options exercisable at end of period (in shares) | shares	418,393
Weighted average exercise price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 30.30
Options cancelled/forfeited (in dollars per share) | $ / shares	30.23
Options outstanding at end of period (in dollars per shares) | $ / shares	30.30
Options exercisable at end of period (in dollars per shares) | $ / shares	$ 30.30
Weighted average remaining contractual term, in years
Options outstanding at end of period	4 years
Options exercisable at end of period	4 years
Total intrinsic value of awards exercised (in millions):
Options outstanding at end of period | $	$ 0.0
Options exercisable at end of period | $	$ 0.0