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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 | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2021 USD ($) director executive $ / shares shares | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) director executive $ / shares shares | Sep. 30, 2020 USD ($) | Sep. 30, 2021 $ / shares | Dec. 31, 2020 USD ($) | Feb. 29, 2020 USD ($) ordinary_membership_unit board_member | Feb. 10, 2020 USD ($) | May 25, 2017 CAD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock liquidation preference per share (in CAD per share) | $ / shares | $ 0.001 |  | $ 0.001 |  |  |  |  |  |
Income (loss) from equity method investments |  |  | $ (11) | $ (8) |  |  |  |  |
SoundCloud Holdings, LLC |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Number of board members | board_member |  |  |  |  |  |  | 9 |  |
SoundCloud Holdings, LLC |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Revenue share expense | $ 15 | $ 13 | 42 | 36 |  |  |  |  |
Related party liabilities | $ 19 |  | $ 19 |  |  |  |  |  |
SoundCloud Holdings, LLC |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Equity method investments |  |  |  |  |  |  |  | $ 75 |
Management | Executives | Liberty Media |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Number of related party members on board of directors | executive | 3 |  | 3 |  |  |  |  |  |
Management | Director | Liberty Media |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Number of related party members on board of directors | director | 1 |  | 1 |  |  |  |  |  |
Equity Method Investee |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Notes receivable, related parties |  |  |  |  |  |  |  |  | $ 131
Income (loss) from equity method investments | $ (1) | 1 | $ (1) | (1) |  |  |  |  |
Equity Method Investee | Maximum |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from related party debt |  |  | $ 2 | 11 |  |  |  |  |
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% |  | 70.00% |  |  |  |  |  |
Equity method investment, voting interest percentage | 33.00% |  | 33.00% |  |  |  |  |  |
Number of preferred shares owned (in shares) | shares | 591 |  | 591 |  |  |  |  |  |
Preferred stock liquidation preference per share (in CAD per share) | $ / shares |  |  |  |  | $ 1 |  |  |  |
Notes receivable, related parties | $ 121 |  | $ 121 |  |  | $ 123 |  |  |
Equity method investments | 338 |  | 338 |  |  | $ 332 |  |  |
Equity method investment, dividends, including reduction of investment | 1 | 1 | 1 | 1 |  |  |  |  |
Revenue from related parties | $ 25 | $ 25 | $ 76 | $ 73 |  |  |  |  |
Equity Method Investee | SoundCloud Holdings, LLC |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Number of board members appointed | board_member |  |  |  |  |  |  | 2 |  |
Equity Method Investee | SoundCloud Holdings, LLC | Series G Membership Units |  |  |  |  |  |  |  |  |
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 |  |
Common Stock | Management | Liberty Media |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Related party ownership percentage | 79.00% |  | 79.00% |  |  |  |  |  |

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