Collaboration, License, and Other Agreements - Alnylam (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Accounts receivable, net	$ 4,839.0	$ 6,036.5
Roche Collaboration Agreement
Disaggregation of Revenue [Line Items]
Accounts receivable, net	204.3	0.0
Accrued expenses and other current liabilities	$ 0.0	$ 268.8

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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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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