SCHEDULE I (Parent Company Information) CONDENSED BALANCE SHEET (Parenthetical) (Details) - Liberty Global Plc - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Class A
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	181,560,735	204,450,499
Common stock, outstanding (in shares)	181,560,735	204,450,499
Class B
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	12,151,526	11,099,593
Common stock, outstanding (in shares)	12,151,526	11,099,593
Class C
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	438,867,447	531,174,389
Common stock, outstanding (in shares)	438,867,447	531,174,389

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Face amount or stated value per share of common stock.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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