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DEBT - Convertible Senior Notes due in 2026 Narrative (Details) $ / shares in Units, shares in Millions |  | 6 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 01, 2021 USD ($) trading_day $ / shares shares | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Mar. 12, 2021 USD ($) | Dec. 31, 2020 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Deferred taxes |  | $ 130,571,000 |  |  | $ 92,904,000
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 2026 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument face amount | $ 575,000,000.0 |  |  | $ 57,500,000 |
Interest rate | 0.00% |  |  |  |
Proceeds from convertible debt | $ 623,000,000.0 |  |  |  |
Conversion ratio | 0.0032523 |  |  |  |
Debt conversion price (in USD per share) | $ / shares | $ 307.47 |  |  |  |
Convertible note, liability component | $ 509,000,000.0 |  |  |  |
Convertible note, equity component | 123,500,000 |  |  |  |
Deferred taxes |  | 40,000,000.0 |  |  |
Debt issuance costs | 10,000,000.0 |  |  |  |
Unamortized debt issuance costs | 8,000,000.0 | $ 7,500,000 |  |  |
Debt issuance costs, allocated to capital | $ 2,000,000.0 |  |  |  |
Effective percentage rate |  | 4.44% |  |  |
Unamortized discount |  | $ 116,100,000 |  |  |
Remaining discount amortization period |  | 4 years 8 months 12 days |  |  |
Conversion shares (in shares) | shares | 2.1 |  |  |  |
Payment for bonds hedge | $ 124,600,000 |  |  |  |
Warrants issued, strike price (in USD per share) | $ / shares | $ 397.91 |  |  |  |
Proceeds from sale of warrants | $ 97,400,000 |  |  |  |
Convertible Notes | Convertible Senior Notes Due 2026 | Discount rate |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Measurement input | 0.0444 |  |  |  |
Period One | Convertible Notes | Convertible Senior Notes Due 2026 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Threshold percentage | 130.00% |  |  |  |
Stock trigger price (in USD per share) | $ / shares | $ 399.71 |  |  |  |
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 2026 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Threshold percentage | 100.00% |  |  |  |
Number of consecutive trading days | trading_day | 5 |  |  |  |
Business day period after measurement period | 5 days |  |  |  |

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