Financial Instruments - Summary of Financial Assets with Maturities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Cash and Cash Equivalents [Line Items]
Cash equivalents, total	$ 1,632.2	$ 626.9
Commercial paper
Cash and Cash Equivalents [Line Items]
Cash equivalents, total	247.6	61.1
Overnight reverse repurchase agreements
Cash and Cash Equivalents [Line Items]
Cash equivalents, total	200.0	37.4
Money market funds
Cash and Cash Equivalents [Line Items]
Cash equivalents, total	901.6	505.1
Short-term debt securities
Cash and Cash Equivalents [Line Items]
Cash equivalents, total	$ 283.0	$ 23.3