Debt - Convertible Senior Notes Due 2022, Convertible Senior Notes Due 2024 and Convertible Senior Notes Due 2026 (Details) - Convertible Senior Notes - USD ($) $ in Millions	1 Months Ended
	Aug. 31, 2019	Dec. 31, 2024
0.75% Convertible Senior Notes due 2024 and 1.50% Convertible Senior Notes due 2026
Debt
Debt issuance costs incurred	$ 9.0
0.75% Convertible Senior Notes due 2024
Debt
Debt instrument term	5 years
Effective interest rate on liability components (as a percent)		1.20%
1.50% Convertible Senior Notes due 2026
Debt
Debt instrument term	7 years
Effective interest rate on liability components (as a percent)		1.90%