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Related Party Transactions - Additional Information (Details) $ / shares in Units, $ / shares in Units, shares in Millions, $ in Millions, $ in Millions |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
May 25, 2017 CAD ($) | Mar. 31, 2020 USD ($) director executive $ / shares shares | Mar. 31, 2019 USD ($) | Mar. 31, 2020 $ / shares | Feb. 10, 2020 USD ($) board_member ordinary_membership_unit | Dec. 31, 2019 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |
Preferred stock liquidation preference per share (in dollars per share) | $ / shares |  | $ 0.001 |  |  |  |
Loss on unconsolidated entity investments, net |  | $ 2 | $ 4 |  |  |
SoundCloud Holdings, LLC |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Number of board members | board_member |  |  |  |  | 9 |
SoundCloud Holdings, LLC |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Equity method investments |  |  |  |  | $ 75 |
Management | Liberty Media | Executives |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Number of related party members on board of directors | executive |  | 1,000 |  |  |  |
Management | Liberty Media | Senior Advisor |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Number of related party members on board of directors | executive |  | 1,000 |  |  |  |
Management | Liberty Media | Director |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Number of related party members on board of directors | director |  | 1,000 |  |  |  |
Management | Liberty Media | Common Stock |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Related party ownership percentage |  | 72.00% |  |  |  |
Equity Method Investee |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Notes receivable, related parties | $ 131 |  |  |  |  |
Proceeds from related party debt |  |  | 1 |  |  |
Equity Method Investee | Services Agreement |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Period of agreement | 30 years |  |  |  |  |
Equity Method Investee | Services Agreement, Years 1 Through 5 |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Payments receivable, percentage of gross revenue | 25.00% |  |  |  |  |
Equity Method Investee | Advisory Services Agreement |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Period of agreement | 30 years |  |  |  |  |
Payments receivable, percentage of gross revenue | 5.00% |  |  |  |  |
Equity Method Investee | Sirius XM Canada |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Equity method investment, equity interest percentage |  | 70.00% |  |  |  |
Equity method investment, voting interest percentage |  | 33.00% |  |  |  |
Number of preferred shares owned | shares |  | 591 |  |  |  |
Preferred stock liquidation preference per share (in dollars per share) | $ / shares |  |  |  | $ 1 |  |
Notes receivable, related parties |  | $ 118 |  |  |  | $ 131
Equity method investments |  | 300 |  |  |  | $ 321
Revenue from related parties |  | 25 | 24 |  |  |
Equity Method Investee | SoundCloud Holdings, LLC |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Number of board members appointed | board_member |  |  |  |  | 2 |
Maximum | Equity Method Investee |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Proceeds from related party debt |  | 3 |  |  |  |
Maximum | Equity Method Investee | Sirius XM Canada |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Equity method investment, dividends, including reduction of investment |  | 1 | 1 |  |  |
Maximum | Equity Method Investee | SoundCloud Holdings, LLC |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Loss on unconsolidated entity investments, net |  | 1 |  |  |  |
Series G Membership Units | Equity Method Investee | SoundCloud Holdings, LLC |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Equity method investments |  |  |  |  | $ 75 |
Series G membership unit conversion ratio (ordinary membership unit per series G membership unit) | ordinary_membership_unit |  |  |  |  | 1 |
SoundCloud Holdings, LLC |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Revenue share expense |  | 12 | $ 3 |  |  |
Related party liabilities |  | $ 18 |  |  |  |

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