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Debt - Summary of Conversion Features- Narrative (Details) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 USD ($) $ / shares | Mar. 31, 2022 USD ($) day | Mar. 31, 2021 USD ($)
Debt Instrument [Line Items] |  |  |
If-converted value in excess of principal |  | $ 1,000 |
Debt instrument, unamortized discount |  | $ 124,600,000 | $ 273,000,000.0
Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Option indexed to equity, strike price (in dollars per share) | $ / shares | $ 116.79 |  |
2015 Senior Convertible Debt |  |  |
Debt Instrument [Line Items] |  |  |
Threshold percentage of stock price trigger |  | 130.00% |
Remaining period, in years, over which unamortized debt discount will be recognized as non-cash interest expense (in years) |  | 2 years 10 months 24 days |
2017 Senior Convertible Debt |  |  |
Debt Instrument [Line Items] |  |  |
Remaining period, in years, over which unamortized debt discount will be recognized as non-cash interest expense (in years) |  | 4 years 10 months 24 days |
2020 Senior Convertible Debt |  |  |
Debt Instrument [Line Items] |  |  |
Remaining period, in years, over which unamortized debt discount will be recognized as non-cash interest expense (in years) |  | 2 years 7 months 6 days |
2017 Junior Convertible Debt |  |  |
Debt Instrument [Line Items] |  |  |
Remaining period, in years, over which unamortized debt discount will be recognized as non-cash interest expense (in years) |  | 14 years 10 months 24 days |
Convertible Debt |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, redemption price (percent) |  | 100.00% |
Convertible Debt | Debt Instrument, Redemption, Period One |  |  |
Debt Instrument [Line Items] |  |  |
Threshold percentage of stock price trigger |  | 130.00% |
Threshold trading days | day |  | 20 |
Threshold consecutive trading days | day |  | 30 |
Convertible Debt | Debt Instrument, Redemption, Period Two |  |  |
Debt Instrument [Line Items] |  |  |
Threshold percentage of stock price trigger |  | 98.00% |
Threshold trading days | day |  | 5 |
Threshold consecutive trading days | day |  | 10 |
Senior Indebtedness |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, redemption price (percent) |  | 101.00% |
Senior Indebtedness | 2020 Senior Convertible Debt |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuance costs, including equity portion, gross | $ 10,800,000 |  |
Debt issuance costs, gross | 9,000,000 |  |
Equity portion of convertible debt issuance costs | 1,800,000 |  |
Debt instrument, unamortized discount |  | $ 110,000,000 |
Capped options indexed to equity, costs | $ 35,800,000 |  |

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- Definition Deferred Issuance Costs, Including Equity Portion of Costs, Gross + References No definition available. + Details
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- Definition The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031898-161870 + Details
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- Definition Remaining amortization period for discount on the liability component of convertible debt which may be settled in cash upon conversion, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031898-161870 + Details
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- Definition Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature. + References No definition available. + Details
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