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Convertible Debt (Tables) | 3 Months Ended
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Mar. 31, 2023
0% Notes [Member] |
Convertible Notes [Abstract] |
Convertible Senior Notes | At March 31, 2023, we had the following 0% Notes outstanding (in millions except interest rate and price per share data):
|  | 0% Notes |
Outstanding principal balance |  | $ | 632.5 |
Unamortized debt issuance costs |  | $ | 9.5 |
Maturity date |  | April 2026 |
Interest rate |  | 0 percent |
Effective interest rate |  | 0.5 percent |
Conversion price per share |  | $ | 57.84 |
Effective conversion price per share with call spread |  | $ | 76.39 |
Total shares of common stock subject to conversion |  |  | 10.9 |
0.125% Notes [Member] |
Convertible Notes [Abstract] |
Convertible Senior Notes | At March 31, 2023, we had the following 0.125% Notes outstanding with interest payable semi-annually (in millions except interest rate and price per share data):
|  | 0.125% Notes |
Outstanding principal balance |  | $ | 548.8 |
Unamortized debt issuance costs |  | $ | 3.8 |
Maturity date |  | December 2024 |
Interest rate |  | 0.125 percent |
Effective interest rate |  | 0.5 percent |
Conversion price per share |  | $ | 83.28 |
Effective conversion price per share with call spread |  | $ | 123.38 |
Total shares of common stock subject to conversion |  |  | 6.6 |

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