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v3.21.1

DEBT - Convertible Senior Notes due in 2028 Narrative (Details) $ / shares in Units, shares in Millions |  | 3 Months Ended
--- | --- | ---
Mar. 01, 2021 USD ($) trading_day $ / shares shares | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($)
Debt Instrument [Line Items] |  |  |
Payment for bonds hedge |  | $ 286,235,000 | $ 89,056,000
Proceeds from sale of warrants |  | 220,800,000 | $ 71,552,000
Convertible Notes | Convertible Senior Notes Due 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument face amount | $ 575,000,000 |  |
Interest rate | 0.00% |  |
Proceeds from convertible debt | $ 566,400,000 |  |
Conversion ratio | 0.0035104 |  |
Debt conversion price (in USD per share) | $ / shares | $ 284.87 |  |
Convertible note, liability component | $ 415,000,000.0 |  |
Convertible note, equity component | 160,000,000.0 |  |
Debt issuance costs | 9,100,000 |  |
Unamortized debt issuance costs | 6,600,000 | 6,500,000 |
Debt issuance costs, allocated to capital | $ 2,500,000 |  |
Unamortized discount |  | $ 158,400,000 |
Remaining discount amortization period |  | 6 years 10 months 24 days |
Conversion shares (in shares) | shares | 2.0 |  |
Payment for bonds hedge | $ 161,600,000 |  |
Warrants issued, strike price (in USD per share) | $ / shares | $ 397.91 |  |
Proceeds from sale of warrants | $ 123,400,000 |  |
Convertible Notes | Convertible Senior Notes Due 2028 | Discount rate |  |  |
Debt Instrument [Line Items] |  |  |
Measurement input |  | 0.0477 |
Period One | Convertible Notes | Convertible Senior Notes Due 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Threshold percentage | 130.00% |  |
Stock trigger price (in USD per share) | $ / shares | $ 370.33 |  |
Number of threshold trading days | trading_day | 20 |  |
Number of consecutive trading days | trading_day | 30 |  |
Measurement period percentage of stock price trigger | 98.00% |  |
Period Two | Convertible Notes | Convertible Senior Notes Due 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Threshold percentage | 100.00% |  |
Number of consecutive trading days | trading_day | 5 |  |

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