Debt - Narrative (Details) $ / shares in Units, $ in Millions			1 Months Ended			3 Months Ended	6 Months Ended		12 Months Ended
	May 15, 2023 USD ($)	Nov. 15, 2022	Aug. 31, 2022 USD ($)	Jan. 31, 2021 USD ($)	May 31, 2018 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($) shares
Debt Instrument [Line Items]
Payments to unwind warrants									$ 18.4
2023 convertible senior notes | Convertible Notes
Debt Instrument [Line Items]
Interest rate (as a percent)					0.75%
Principal amount					$ 750.0
Proceeds from debt, net of issuance costs					$ 733.1
Debt issuance costs						$ 16.9	$ 16.9
Term of debt instrument							5 years
Effective interest rate (as a percent)						0.50%	0.50%
Total interest expense						$ 0.3	$ 0.6
Contractual interest expense						0.2	0.4
Amortized issuance costs						$ 0.1	$ 0.2
Payment of accrued interest	$ 0.3
Maturities of debt	$ 76.9
Securities called by warrants (in shares) | shares					3,018,327				2,559,254
Initial conversion price (in USD per share) | $ / shares					$ 206.65
Payments for convertible bond hedges					$ 140.3
Exercise price (dollars per share) | $ / shares					$ 315.38
Value of warrants issued					$ 90.0
Repurchased amount of debt instrument				$ 20.3					$ 152.0
Repayments of notes				19.1					156.0
Accrued interest portion of repurchased amount of debt instrument				$ 0.1				$ 0.4	$ 0.3
2023 convertible senior notes | Convertible Notes | Minimum
Debt Instrument [Line Items]
Initial conversion rate (shares per $1,000)		0.004839
2023 convertible senior notes | Convertible Notes | Maximum
Debt Instrument [Line Items]
Initial conversion rate (shares per $1,000)		0.0062907
2023 convertible senior notes | Convertible Notes | Notes repurchased in August 2022
Debt Instrument [Line Items]
Repayments of notes			$ 223.7
Repurchased amount of debt instrument			$ 227.8