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Quarterly report pursuant to Section 13 or 15(d)

Tracking Stocks (Narrative) (Details)

v3.10.0.1
Tracking Stocks (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended
Oct. 09, 2018
Sep. 30, 2018
Dec. 31, 2017
Targeted or Tracking Stock, Stock [Line Items] Ìý Ìý Ìý
Cash and cash equivalents Ìý $ 355 $ 1,029
Liberty Sirius XM Group Ìý Ìý Ìý
Targeted or Tracking Stock, Stock [Line Items] Ìý Ìý Ìý
Cash and cash equivalents Ìý 126 Ìý
Braves Group Ìý Ìý Ìý
Targeted or Tracking Stock, Stock [Line Items] Ìý Ìý Ìý
Cash and cash equivalents Ìý 78 Ìý
Formula One Group Ìý Ìý Ìý
Targeted or Tracking Stock, Stock [Line Items] Ìý Ìý Ìý
Cash and cash equivalents Ìý 151 Ìý
SIRIUS XM Ìý Ìý Ìý
Targeted or Tracking Stock, Stock [Line Items] Ìý Ìý Ìý
Common Stock, Dividends, Per Share, Declared $ 0.0121 Ìý Ìý
Payments of Dividends Ìý 148 Ìý
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees Ìý 104 Ìý
SIRIUS XM | Liberty Sirius XM Group Ìý Ìý Ìý
Targeted or Tracking Stock, Stock [Line Items] Ìý Ìý Ìý
Cash and cash equivalents Ìý $ 46 Ìý
Formula 1 | Braves Group Ìý Ìý Ìý
Targeted or Tracking Stock, Stock [Line Items] Ìý Ìý Ìý
Percentage ownership Ìý 15.10% Ìý
Investment Owned, Balance, Shares Ìý 9,084,940 Ìý
Formula 1 | Braves Group | Common Class C Ìý Ìý Ìý
Targeted or Tracking Stock, Stock [Line Items] Ìý Ìý Ìý
Investment Owned, Balance, Shares Ìý 9,084,940 Ìý
Formula 1 | Formula One Group Ìý Ìý Ìý
Targeted or Tracking Stock, Stock [Line Items] Ìý Ìý Ìý
Cash and cash equivalents Ìý $ 45 Ìý
Braves Holdings | Braves Group Ìý Ìý Ìý
Targeted or Tracking Stock, Stock [Line Items] Ìý Ìý Ìý
Cash and cash equivalents Ìý $ 44 Ìý