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v3.19.1

Related Party Transactions - Liberty Media, Sirius XM Canada, Pandora - Additional Information (Details) $ / shares in Units, $ / shares in Units, shares in Millions, $ in Millions, $ in Millions |  | 3 Months Ended | 5 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
May 25, 2017 USD ($) | Mar. 31, 2019 USD ($) director executive $ / shares shares | Mar. 31, 2018 USD ($) | May 24, 2017 shareholder | Dec. 31, 2017 USD ($) shares | Mar. 31, 2019 $ / shares | Dec. 31, 2018 USD ($) | May 25, 2017 CAD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Preferred stock liquidation preference per share (in Canadian dollars per share) | $ / shares |  | $ 0.001 |  |  |  |  |  |
Current portion of deferred revenue |  | $ 1,994 |  |  |  |  | $ 1,932 |
Deferred revenue, noncurrent |  | 145 |  |  |  |  | 149 |
Pandora |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Pandora investment |  | $ 0 |  |  |  |  | 523 |
Management | Liberty Media | Executives |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Number of related party members on the board of directors | executive |  | 2 |  |  |  |  |  |
Management | Liberty Media | Director |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Number of related party members on the board of directors | director |  | 1 |  |  |  |  |  |
Management | Liberty Media | Common Stock |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Related party ownership percentage |  | 68.00% |  |  |  |  |  |
Equity Method Investee |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Notes receivable, related parties | $ 131 |  |  |  |  |  |  |
Notes receivable, maturity period | 15 years |  |  |  |  |  |  |
Interest rate | 7.62% |  |  |  |  |  |  |
Annual principal repayment period | 60 days |  |  |  |  |  |  |
Annual prepayment cash threshold |  |  |  |  |  |  |  | $ 10
Notes receivable, repayment from related party |  |  | $ 3 |  |  |  |  |
Current portion of deferred revenue |  | $ 3 |  |  |  |  | 3 |
Deferred revenue, noncurrent |  | $ 2 |  |  |  |  | 2 |
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] |  |  |  |  |  |  |  |
Percent of gross revenue receivable | 25.00% |  |  |  |  |  |  |
Equity Method Investee | Services Agreement, Years 6 Through 30 |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Percent of gross revenue receivable | 30.00% |  |  |  |  |  |  |
Equity Method Investee | Advisory Services Agreement |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Period of agreement | 30 years |  |  |  |  |  |  |
Percent of gross revenue receivable | 5.00% |  |  |  |  |  |  |
Equity Method Investee | Common Stock |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Issuance of common stock as part of recapitalization of Sirius XM Canada (in shares) | shares |  |  |  |  | 35 |  |  |
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 shareholders | shareholder |  |  |  | 2 |  |  |  |
Consideration transferred |  |  |  |  | $ 309 |  |  |
Payments to acquire equity method investments |  |  |  |  | 130 |  |  |
Consideration transferred, equity interests issued and issuable |  |  |  |  | $ 179 |  |  |
Number of preferred shares owned (in shares) | shares |  | 591 |  |  |  |  |  |
Preferred stock liquidation preference per share (in Canadian dollars per share) | $ / shares |  |  |  |  |  | $ 1 |  |
Notes receivable, related parties |  | $ 128 |  |  |  |  | 126 |
Equity method investments |  | 320 |  |  |  |  | 311 |
Maximum | Equity Method Investee |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Notes receivable, repayment from related party |  | 1 |  |  |  |  |  |
Maximum | Equity Method Investee | Sirius XM Canada |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Equity method investment, dividends, including reduction of investment |  | 1 | $ 1 |  |  |  |  |
Fair Value, Inputs, Level 2 | Pandora |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Pandora investment |  | $ 0 |  |  |  |  | $ 523 |

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