Marketable Securities and Equity Investments - Schedule of Available-for-Sale Debt Securities at Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Debt securities	$ 8,884.9	$ 5,642.8
Cash and cash equivalents
Debt Securities, Available-for-sale [Line Items]
Debt securities	5,583.9	5,372.9
Marketable securities
Debt Securities, Available-for-sale [Line Items]
Debt securities	803.2	157.7
Long-term marketable securities
Debt Securities, Available-for-sale [Line Items]
Debt securities	$ 2,497.8	$ 112.2