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Related Party Transactions - Additional Information (Details) $ / shares in Units, $ / shares in Units, shares in Millions, $ in Millions, $ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) executive director $ / shares shares | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2020 $ / shares | Feb. 29, 2020 USD ($) board_member ordinary_membership_unit | Feb. 10, 2020 USD ($) | May 25, 2017 CAD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Preferred stock liquidation preference per share (CAD per share) | $ / shares | $ 0.001 |  |  |  |  |  |
Income (loss) from equity method investments | $ (16) | $ (21) | $ (10) |  |  |  |
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 |  |  |  |  |  |
Management | Liberty Media | Senior Advisor |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Number of related party members on board of directors | executive | 1 |  |  |  |  |  |
Management | Liberty Media | Director |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Number of related party members on board of directors | director | 1 |  |  |  |  |  |
Management | Liberty Media | Common Stock |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Related party ownership percentage | 76.00% |  |  |  |  |  |
Equity Method Investee |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Notes receivable, related parties |  |  |  |  |  |  | $ 131
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 (in shares) | shares | 591 |  |  |  |  |  |
Preferred stock liquidation preference per share (CAD per share) | $ / shares |  |  |  | $ 1 |  |  |
Notes receivable, related parties | $ 123 | 131 |  |  |  |  |
Equity method investments | 332 | 321 |  |  |  |  |
Equity method investment, dividends, including reduction of investment | 2 | 2 | 2 |  |  |  |
Revenue from related parties | 97 | 98 | 97 |  |  |  |
Equity Method Investee | SoundCloud Holdings, LLC |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Number of board members appointed | board_member |  |  |  |  | 2 |  |
Income (loss) from equity method investments | (1) |  |  |  |  |  |
Maximum | Equity Method Investee |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Proceeds from related party debt | 11 | 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 | 55 | $ 40 | $ 0 |  |  |  |
Related party liabilities | $ 24 |  |  |  |  |  |

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