Earnings or Loss per Share (Narrative) (Details) - shares shares in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2015
Liberty Global Group [Member] | Stock Options, SARs, PSARs, Restricted Shares, and RSUs [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Aggregate number of shares excluded from computation of EPS		49.3
Liberty Global Group [Member] | PSUs / PGUs [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Aggregate number of shares excluded from computation of EPS		8.9
Liberty Global Group [Member] | Obligations That May Be Settled in Cash or Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Aggregate number of shares excluded from computation of EPS		2.7
LiLAC Group [Member] | Stock Options, SARs, PSARs, Restricted Shares, and RSUs [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Aggregate number of shares excluded from computation of EPS		1.8
LiLAC Group [Member] | PSUs / PGUs [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Aggregate number of shares excluded from computation of EPS		0.4
Old Liberty Global [Member] | Stock Options, SARs, PSARs, Restricted Shares, and RSUs [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Aggregate number of shares excluded from computation of EPS			42.0
Old Liberty Global [Member] | PSUs / PGUs [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Aggregate number of shares excluded from computation of EPS			5.3
Old Liberty Global [Member] | Obligations That May Be Settled in Cash or Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Aggregate number of shares excluded from computation of EPS			2.6
VM Convertible Senior Notes [Member] | Liberty Global Group [Member] | Stock Options, SARs, PSARs, Restricted Shares, and RSUs [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Aggregate number of shares excluded from computation of EPS	24.3
VM Convertible Senior Notes [Member] | Liberty Global Group [Member] | Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Aggregate number of shares excluded from computation of EPS	2.7