Collaboration, License, and Other Agreements - Schedule of Contract Balances, IO Collaboration (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Accounts receivable, net	$ 5,452.0	$ 4,114.7
Sanofi Collaboration Agreement, Immuno-oncology
Disaggregation of Revenue [Line Items]
Accounts receivable, net	0.1	6.5
Deferred revenue	16.2	10.7
Other liabilities	$ 286.0	$ 280.9

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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