Summary of Significant Accounting Policies - Recent Adopted Accounting Policies (Details) - USD ($) $ in Millions  | 
Sep. 30, 2022  | 
Jan. 01, 2022  | 
Dec. 31, 2021  | 
|---|---|---|---|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Accumulated deficit | $ (3,609) | $ (2,636) | |
| Cumulative Effect, Adjustment | |||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Accumulated deficit | $ (14) | ||
| 1.75% Senior Notes Due 2023 | Senior Notes | |||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Carrying value | $ 193 | $ 177 | |
| Stated interest rate (as a percent) | 1.75% | ||
| 1.75% Senior Notes Due 2023 | Senior Notes | Pandora | |||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Stated interest rate (as a percent) | 1.75% | ||
| 1.75% Senior Notes Due 2023 | Senior Notes | Cumulative Effect, Adjustment | |||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Carrying value | $ 14 | 
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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