| Debt - Narrative (Details)
 |  |  |  |  |  |  |  |  | 1 Months Ended | 9 Months Ended | 12 Months Ended | 18 Months Ended |  |  |  |  |  |  | 
| Jan. 23, 2017  USD ($)  $ / shares | Jan. 20, 2017  USD ($) | Nov. 08, 2016  USD ($) | Aug. 17, 2016  USD ($)  $ / shares  shares | Apr. 15, 2016  shares | Oct. 17, 2013  USD ($) | May 01, 2013  USD ($) | Apr. 30, 2013  USD ($) | Oct. 31, 2016  USD ($) | Oct. 31, 2015  USD ($) | Oct. 31, 2014  USD ($) | May 31, 2013  USD ($) | Aug. 31, 2008  USD ($)  $ / shares | Dec. 31, 2013 | Dec. 31, 2016  USD ($)  $ / shares  shares | Dec. 31, 2015  USD ($)  $ / shares  shares | Dec. 31, 2014  USD ($)  $ / shares  $ / item  shares | Dec. 31, 2013  USD ($)  item | Oct. 31, 2014  USD ($) | May 31, 2016  USD ($) | Jun. 30, 2015  USD ($) | Mar. 31, 2015  USD ($) | Sep. 30, 2013  USD ($) | Aug. 31, 2013  USD ($) | Aug. 31, 2012  USD ($) | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,018,000,000 | $ 6,881,000,000 |  |  |  |  |  |  |  |  |  | 
| Warrant expiration period |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 81 days |  |  |  |  |  |  |  |  |  |  | 
| Borrowings of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,745,000,000 | 2,213,000,000 | $ 2,758,000,000 |  |  |  |  |  |  |  |  | 
| Repayments of Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,749,000,000 | $ 1,196,000,000 | 1,936,000,000 |  |  |  |  |  |  |  |  | 
| Number of margin loans | item |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  | 
| Loss on extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (24,000,000) |  |  |  |  |  |  |  |  |  |  | 
| Sirius XM Senior Secured Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Line of Credit Facility, Remaining Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,360,000,000 |  |  |  |  |  |  |  |  |  |  | 
| 1.375% Cash Convertible Senior Notes due 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  | 1.375% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument interest rate |  |  |  |  |  | 1.375% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| $670 million margin loan due 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  |  |  |  |  | $ 670,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Repayments of Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 670,000,000 |  |  |  |  |  |  |  |  | 
| Debt Instrument, Description of Variable Rate Basis |  |  |  |  |  |  | three-month LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  | 3.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| $500 Million Margin Loan due 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Description of Variable Rate Basis |  |  | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Proceeds from Issuance of Secured Debt |  | $ 350,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument, unused borrowing capacity, fee, percent |  |  | 0.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Term |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| $500 Million Margin Loan due 2018 | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Basis Spread on Variable Rate |  |  | 2.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| $750 million margin loan due 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Description of Variable Rate Basis |  |  |  |  |  |  |  |  | LIBOR | LIBOR | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Effective interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.59% |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument, unused borrowing capacity, fee, percent |  |  |  |  |  |  |  |  | 0.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| $750 million margin loan due 2018 | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  | 1.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| $750 million margin loan due 2018 | Term loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  |  |  |  |  |  |  | $ 250,000,000 | $ 250,000,000 | $ 250,000,000 |  |  |  |  |  |  |  | $ 250,000,000 |  |  |  |  |  |  | 
| Borrowings of debt |  |  |  |  |  |  |  | $ 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Description of Variable Rate Basis |  |  |  |  |  |  |  |  |  |  |  |  |  | LIBOR |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |  | 
| $750 million margin loan due 2018 | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  |  |  |  |  |  |  |  | $ 1,000,000,000 | $ 750,000,000 |  |  |  |  |  |  |  | $ 750,000,000 |  |  |  |  |  |  | 
| Borrowings of debt |  |  |  |  |  |  |  | $ 450,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Repayments of Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 450,000,000 |  |  |  |  |  |  |  | 
| Debt instrument, unused borrowing capacity, fee, percent |  |  |  |  |  |  |  |  |  | 0.75% | 0.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Line of Credit Facility, Remaining Borrowing Capacity |  |  |  |  |  |  |  |  | 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Sirius XM 7% Exchangeable Senior Subordinated Notes due 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 550,000,000 |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  | 7.00% |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument, face amount per debenture |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Conversion, Converted Instrument, Amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 502,000,000 |  |  |  |  |  |  |  |  | 
| Debt instrument interest rate |  |  |  |  |  |  |  |  |  |  |  |  | 7.00% |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Convertible, Conversion Ratio |  |  |  |  |  |  |  |  |  |  |  |  | 543.1372 |  |  |  |  |  |  |  |  |  |  |  |  | 
| conversion price for exchangeable debt | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.841 |  |  |  |  |  |  |  |  |  |  |  |  | 
| Sirius XM 5.25% Senior Secured Notes due 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000,000 | 
| Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.25% |  |  |  |  |  |  |  |  |  | 
| Debt instrument interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.25% |  |  |  |  |  |  |  |  |  | 
| Sirius XM Senior Secured Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Effective interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.41% |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument, unused borrowing capacity, fee, percent |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.25% |  |  |  |  |  |  |  |  |  |  | 
| Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,750,000,000 |  |  |  |  | 
| Proceeds from Long-term Lines of Credit |  |  |  |  |  |  |  |  | 310,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Sirius XM 4.25% Senior Notes due 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.25% |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.25% |  |  |  |  |  |  |  |  |  |  | 
| Sirius XM 4.25% Senior Notes due 2020 | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Sirius XM 4.625% Senior Notes due 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  |  |  |  |  |  |  |  |  |  | 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.625% |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.625% |  |  |  |  |  |  |  |  |  | 
| Debt instrument interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.625% |  |  |  |  |  |  |  |  |  |  | 
| Sirius XM Senior Notes Due 2020 And 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Borrowings of debt |  |  |  |  |  |  |  |  |  |  |  | $ 989,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Sirius XM 5.75% Senior Notes due 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 600,000,000 |  | 
| Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 594,000,000 |  | 
| Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.75% |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.75% |  |  |  |  |  |  |  |  |  |  | 
| Sirius XM 5.875% Senior Notes due 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 650,000,000 |  |  | 
| Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 643,000,000 |  |  | 
| Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.875% |  |  |  |  |  |  |  |  |  |  | 
| Loss on extinguishment of debt |  |  |  |  |  |  |  |  | (24,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.875% |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Repurchase Amount |  |  |  |  |  |  |  |  | 669,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Repurchased Face Amount |  |  |  |  |  |  |  |  | 650,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Repayments of Senior Debt |  |  |  |  |  |  |  |  | $ 359,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Sirius XM 5.375% Senior Notes Due 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000,000 |  |  |  | 
| Debt discount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,000,000 |  |  |  | 
| Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.375% |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.375% |  |  |  |  |  |  |  |  |  |  | 
| Sirius XM 5.375% Senior Notes due 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  |  | 
| Debt discount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,000,000 |  |  |  |  |  | 
| Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.375% |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.375% |  |  |  |  |  |  |  |  |  |  | 
| Liberty 1% Cash Convertible Notes Due 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount | $ 450,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Interest Rate, Stated Percentage | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument interest rate | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Convertion amount | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Minimum | $750 million margin loan due 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  | 1.75% | 1.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Maximum | $750 million margin loan due 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  | 2.25% | 2.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| SIRIUS XM | $750 million margin loan due 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Margin loan | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,138,400,000 |  |  |  |  |  |  |  |  |  |  | 
| SIRIUS XM | $750 million margin loan due 2018 | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Line of Credit Facility, Remaining Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  | 
| Live Nation | $500 Million Margin Loan due 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Margin loan | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 53,700,000 |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Collateral Amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,430,000,000 |  |  |  |  |  |  |  |  |  |  | 
| Formula 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Consideration payable | 400,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Viacom, Inc. | $500 Million Margin Loan due 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Margin loan | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,900,000 |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Collateral Amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 65,000,000 |  |  |  |  |  |  |  |  |  |  | 
| SIRIUS XM | $750 million margin loan due 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Collateral Amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,066,000,000 |  |  |  |  |  |  |  |  |  |  | 
| SIRIUS XM | Sirius XM 7% Exchangeable Senior Subordinated Notes due 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Conversion, Converted Instrument, Shares Issued | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 272,855,859 |  |  |  |  |  |  |  |  | 
| Delta Topco | Delta Topco Limited Exchangeable Redeemable Loan Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount | $ 351,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Interest Rate, Stated Percentage | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Maximum estimated shares issuable upon exchange of debt. | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,700,000 |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument interest rate | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| 1.375% Convertible Notes Bond Hedge Transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Payments for Derivative Instrument, Financing Activities |  |  |  |  |  | $ 299,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Common Class A | 1.375% Convertible Notes Bond Hedge Transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Securities Basket price per share | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 44.58 |  |  |  |  |  |  |  |  |  |  | 
| Common Class A | Warrant transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Securities Basket price per share | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 44.58 |  |  |  |  |  |  |  |  |  |  | 
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 61.16 |  |  |  |  |  |  |  |  |  |  | 
| Liberty Media Corporation | 2.25% Exchangeable Senior Debentures due 2046 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt face amount |  |  |  | $ 445,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument interest rate |  |  |  | 2.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Liberty Media Corporation | Time Warner, Inc. | 2.25% Exchangeable Senior Debentures due 2046 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Shares underlying the debentures | shares |  |  |  | 4,250,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Liberty Media Corporation | Time Warner, Inc. | 2.25% Exchangeable Senior Debentures due 2046 | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Exchange Price of Shares Attributable to Debentures | $ / shares |  |  |  | $ 104.55 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Liberty Media Corporation | 1.375% Convertible Notes Bond Hedge Transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Derivative, Price Risk Option Strike Price | $ / item |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 47.43 |  |  |  |  |  |  |  |  | 
| Liberty Media Corporation | Common Class A | 1.375% Cash Convertible Senior Notes due 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt instrument, face amount per debenture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Convertible, Conversion Ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21.0859 |  |  |  |  |  |  |  |  | 
| conversion price for exchangeable debt | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 47.43 |  |  |  |  |  |  |  |  | 
| Liberty Media Corporation | Common Class A | 1.375% Convertible Notes Bond Hedge Transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Forward contract, number of underlying shares | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,085,900 |  |  |  |  |  |  |  |  | 
| Liberty Media Corporation | Common Class A | Warrant transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Class of Warrant or Right, Outstanding | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,085,900 |  |  |  |  |  |  |  |  |  | 
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 64.46 |  |  |  |  |  |  |  |  |  | 
| Liberty Sirius XM Group |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,107,000,000 | $ 5,709,000,000 |  |  |  |  |  |  |  |  |  | 
| Number of tracking stock shares received in the Recapitalization for one share of Liberty Media common stock | shares |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Borrowings of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,847,000,000 | 1,978,000,000 | $ 2,658,000,000 |  |  |  |  |  |  |  |  | 
| Repayments of Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,471,000,000 | 1,038,000,000 | 1,266,000,000 |  |  |  |  |  |  |  |  | 
| Loss on extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (24,000,000) |  |  |  |  |  |  |  |  |  |  | 
| Liberty Sirius XM Group | Sirius XM Senior Secured Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 390,000,000 | 340,000,000 |  |  |  |  |  |  |  |  |  | 
| Liberty Sirius XM Group | Common Class A |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Securities basket conversion ratio from shares of Liberty Media Corporation common stock |  |  |  |  | 1.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Liberty Sirius XM Group | Common Class A | 1.375% Convertible Notes Bond Hedge Transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Forward contract, number of underlying shares | shares |  |  |  |  | 21,085,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Liberty Sirius XM Group | Common Class A | Warrant transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Class of Warrant or Right, Outstanding | shares |  |  |  |  | 21,085,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Liberty Braves Group |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 328,000,000 | 139,000,000 |  |  |  |  |  |  |  |  |  | 
| Number of tracking stock shares received in the Recapitalization for one share of Liberty Media common stock | shares |  |  |  |  | 0.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Borrowings of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 460,000,000 | 197,000,000 | 100,000,000 |  |  |  |  |  |  |  |  | 
| Repayments of Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 276,000,000 | 158,000,000 |  |  |  |  |  |  |  |  |  | 
| Liberty Braves Group | Common Class A |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Securities basket conversion ratio from shares of Liberty Media Corporation common stock |  |  |  |  | 0.10 |  |  |  |  |  |  |  |  |  | 0.1087 |  |  |  |  |  |  |  |  |  |  | 
| Liberty Braves Group | Common Class A | 1.375% Convertible Notes Bond Hedge Transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Forward contract, number of underlying shares | shares |  |  |  |  | 2,108,590 |  |  |  |  |  |  |  |  |  | 2,292,037 |  |  |  |  |  |  |  |  |  |  | 
| Liberty Braves Group | Common Class A | Warrant transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Class of Warrant or Right, Outstanding | shares |  |  |  |  | 2,108,590 |  |  |  |  |  |  |  |  |  | 2,292,037 |  |  |  |  |  |  |  |  |  |  | 
| Liberty Formula One Group |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,583,000,000 | 1,033,000,000 |  |  |  |  |  |  |  |  |  | 
| Number of tracking stock shares received in the Recapitalization for one share of Liberty Media common stock | shares |  |  |  |  | 0.25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Borrowings of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 438,000,000 | $ 38,000,000 |  |  |  |  |  |  |  |  |  | 
| Repayments of Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |  | $ 670,000,000 |  |  |  |  |  |  |  |  | 
| Liberty Formula One Group | Common Class A |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Securities basket conversion ratio from shares of Liberty Media Corporation common stock |  |  |  |  | 0.25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Liberty Formula One Group | Common Class A | 1.375% Convertible Notes Bond Hedge Transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Forward contract, number of underlying shares | shares |  |  |  |  | 5,271,475 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Liberty Formula One Group | Common Class A | Warrant transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Class of Warrant or Right, Outstanding | shares |  |  |  |  | 5,271,475 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Liberty Formula One Group | Common Class C | Liberty 1% Cash Convertible Notes Due 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Debt Instrument, Convertible, Conversion Ratio | 27.1091 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| conversion price for exchangeable debt | $ / shares | $ 36.89 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |