Leases - Additional Information (Details) ft² in Thousands, $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2024 renewal_option	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2019 ft² renewal_option	Dec. 31, 2015 ft² renewal_option	Dec. 31, 2011 ft² lease building
Lessee, Lease, Description [Line Items]
Operating lease assets		$ 1,356.8	$ 293.6
Long-term operating lease liabilities		1,544.4	348.6
Property and equipment, net		57.9	272.8
Long-term finance lease liabilities		112.8	376.1
Operating leases		1,120.9	2.4	$ 58.6
Increase in operating lease obligations		1,300.0
Reduction to finance leases		275.3
Reduction in property, plant and equipment		107.5
Corporate Headquarters
Lessee, Lease, Description [Line Items]
Number of leases | lease							2
Area of real estate property (in square feet) | ft²							1,100
Lease agreements number of buildings | building							2
Option to extend lease term							15 years
Number of optional renewal terms | renewal_option	2
Optional term of lease agreement (in years)	10 years
Operating lease assets		847.9
Long-term operating lease liabilities		1,000.0
Property and equipment, net			177.0
Long-term finance lease liabilities			$ 258.1
Corporate Headquarters | Buildings and improvements
Lessee, Lease, Description [Line Items]
Operating lease assets		$ 840.0
Jeffrey Leiden Center for Cell and Genetic Therapies
Lessee, Lease, Description [Line Items]
Area of real estate property (in square feet) | ft²					269
Number of optional renewal terms | renewal_option					2
Optional term of lease agreement (in years)					10 years
Lease agreement initial term					16 years
Embedded Leases with Contract Manufacturing Organizations
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease term		8 years
San Diego Lease
Lessee, Lease, Description [Line Items]
Area of real estate property (in square feet) | ft²						170
Number of optional renewal terms | renewal_option						2
Length of lease						16 years
Optional renewal term length						5 years