New Accounting Pronouncements (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
(Decrease) increase from adoption	$ 3,596.6	$ 4,097.1	$ 2,655.8	$ 1,851.9
Additional Paid-In Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
(Decrease) increase from adoption	4,220.2	4,239.6	3,167.2	1,718.3
Retained Earnings (Accumulated Deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
(Decrease) increase from adoption	$ 154.5	(86.5)	$ (507.3)	161.6
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
(Decrease) increase from adoption		(69.3)		0.6
Cumulative Effect, Period of Adoption, Adjustment | Additional Paid-In Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
(Decrease) increase from adoption		(88.2)
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings (Accumulated Deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
(Decrease) increase from adoption		$ 18.9		$ 0.6
2.75% Convertible Notes due 2026 | Convertible Notes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Interest rate	2.75%