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Debt - Senior Convertible Notes (Details) - Senior Notes - USD ($)	Sep. 30, 2023	May 31, 2023	Dec. 31, 2022	May 31, 2020	Nov. 30, 2018
Senior Convertible Notes
Total principal amount	$ 2,581,800,000		$ 1,982,300,000
Unamortized debt issuance costs	(25,200,000)		(12,000,000.0)
Carrying amount of senior convertible notes	2,556,600,000		1,970,300,000
Senior Convertible Notes due 2023
Senior Convertible Notes
Total principal amount	124,300,000		774,800,000		$ 850,000,000
Senior Convertible Notes due 2025
Senior Convertible Notes
Total principal amount	1,207,500,000		1,207,500,000	$ 1,210,000,000
Senior Convertible Notes due 2028
Senior Convertible Notes
Total principal amount	$ 1,250,000,000	$ 1,250,000,000	$ 0

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Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.

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