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DEBT - Convertible Note Hedge and Warrant Transactions (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |  |  | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jul. 24, 2020 | May 31, 2017 | Mar. 31, 2022 | Jul. 21, 2020 | May 24, 2017
Debt Instrument [Line Items] |  |  |  |  |
Share price (in dollars per share) |  |  | $ 119.67 |  |
Termination of convertible note hedge on the 0.625% Convertible Senior Notes |  |  | $ 109.9 |  |
Payments for repurchase of warrants |  |  | $ 94.3 |  |
2020 Hedge and Warrants |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Net proceeds from debt used to pay for the cost of the hedge | $ 63.0 |  |  |  |
Payment of convertible note hedge transactions | $ 124.2 |  |  |  |
Number of shares covered by the hedge transactions | 1.2 |  |  |  |
Initial conversion price per share (in dollars per share) | $ 461.19 |  |  |  |
Strike price of warrants sold (in dollars per share) | $ 709.52 |  |  |  |
Premium of warrant strike price over sales price of common stock | 100.00% |  |  |  |
Share price (in dollars per share) |  |  |  | $ 354.76 |
Proceeds from the sale of warrants related to the Convertible Senior Notes | $ 61.2 |  |  |  |
2017 Hedge and Warrants |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Net proceeds from debt used to pay for the cost of the hedge |  | $ 18.1 |  |  |
Payment of convertible note hedge transactions |  | $ 61.5 |  |  |
Number of shares covered by the hedge transactions | 0.8 | 1.4 |  |  |
Initial conversion price per share (in dollars per share) |  | $ 207.63 |  |  |
Strike price of warrants sold (in dollars per share) |  | $ 266.39 |  |  |
Premium of warrant strike price over sales price of common stock |  | 70.00% |  |  |
Share price (in dollars per share) |  |  |  |  | $ 156.70
Proceeds from the sale of warrants related to the Convertible Senior Notes |  | $ 43.4 |  |  |
Proceeds from hedge and warrants | $ 15.6 |  |  |  |

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