| Royalty-Linked Notes (Tables) | 12 Months Ended | ||||||||||||||||||
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| Dec. 31, 2020 | |||||||||||||||||||
| Royalty Linked Notes [Abstract] | |||||||||||||||||||
| Summary of Royalty-Linked Notes | The balance of the RLNs as of December 31, 2020 is as follows: 
 
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- Definition Royalty linked notes. No definition available. 
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| X | ||||||||||
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- Definition Tabular disclosure of information pertaining to royalty linked notes. No definition available. 
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