Additional Balance Sheet Detail - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Accrued expenses
Product revenue accruals	$ 1,716.4	$ 1,300.8
Payroll and benefits	295.0	246.5
Research, development and commercial contract costs	265.2	198.7
Royalty payable	237.6	215.0
Tax related accruals	99.5	123.3
Other	41.6	42.4
Total	2,655.3	2,126.7
Other current liabilities
Milestone payment due to CRISPR	200.0	0.0
Contract liabilities	170.3	159.6
Finance lease liabilities	50.6	40.8
Operating lease liabilities	33.1	48.6
Other	73.2	62.5
Total	$ 527.2	$ 311.5