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Intangible Assets - Indefinite Life Intangible Assets (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Indefinite life intangible assets: |  |  |
Impairment of intangible assets, indefinite-lived (excluding goodwill) |  | $ 0 | $ 0
Pandora | Trademarks |  |  |
Indefinite life intangible assets: |  |  |
Impairment of intangible assets, indefinite-lived (excluding goodwill) | $ 20,000,000 |  |
Maximum |  |  |
Indefinite life intangible assets: |  |  |
Impairment of intangible assets, indefinite-lived (excluding goodwill) | $ 1,000,000 |  |

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- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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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. + References No definition available. + Details
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- Details
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