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Fair Value Measurements - Fair Value of Convertible Senior Notes (Details) - Senior Notes - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Fair Value Disclosures [Line Items]
Fair value of outstanding senior convertible notes:	$ 4,988.7	$ 3,451.1
Senior Convertible Notes due 2023
Fair Value Disclosures [Line Items]
Fair value of outstanding senior convertible notes:	2,418.9	2,136.2
Senior Convertible Notes due 2025
Fair Value Disclosures [Line Items]
Fair value of outstanding senior convertible notes:	1,290.7	1,314.9
Senior Convertible Notes due 2028
Fair Value Disclosures [Line Items]
Fair value of outstanding senior convertible notes:	$ 1,279.1	$ 0.0

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Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

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