Acquisition (Pro Forma Revenue and Net Earnings) (Details) - HoldCo - GCI Liberty Inc - USD ($) $ / shares in Units, $ in Thousands |
12 Months Ended | |
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Dec. 31, 2018 |
Dec. 31, 2017 |
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| Business Acquisition [Line Items] | ||
| Revenue | $ 899,210 | $ 918,726 |
| Net earnings (loss) | (872,306) | 713,377 |
| Net earnings (loss) attributable to GCI Liberty shareholders | $ (871,839) | $ 713,882 |
| Basic net earnings (loss) attributable to Series A and Series B GCI Liberty, Inc. shareholders per common share (in dollars per share) | $ (8.08) | $ 6.55 |
| Diluted net earnings (loss) attributable to Series A and Series B GCI Liberty, Inc. shareholders per common share (in dollars per share) | $ (8.08) | $ 6.55 |
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- Definition Business Acquisition, Pro Forma Net Income (Loss) Attributable To Common Shareholders No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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