Fair Value Measurements - Fair Value of Long-Term Debt, Including Current Portion (Details) - USD ($) $ in Millions	Dec. 31, 2023	Oct. 16, 2023	Feb. 28, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	$ 3,379.9
Convertible Debt | 0% Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, interest rate	0.00%			0.00%	0.00%
Carrying Amount	$ 794.0			$ 791.1
Fair Value	$ 1,334.4			1,057.8
Convertible Debt | 0.50% Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, interest rate	0.50%		0.50%
Carrying Amount	$ 1,473.1			0.0
Fair Value	$ 1,596.6			$ 0.0
Convertible Debt | 1.625% Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, interest rate	1.625%	1.625%		1.625%	1.625%
Carrying Amount	$ 0.0			$ 137.0
Fair Value	$ 0.0			$ 417.8
Notes Payable | 3.875% Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, interest rate	3.875%			3.875%
Carrying Amount	$ 694.4			$ 693.3
Fair Value	652.0			618.3
Long-term debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	375.0			1,572.1
Fair Value	$ 390.6			$ 1,549.2