Segment Information - Segment Financial Information Footnote (Details) $ in Millions	12 Months Ended
Dec. 31, 2025 USD ($) program	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of restructuring programs \| program	2
Charges related to severance and lease impairment	$ 51.2	$ 21.0	$ 31.4
Charges related to professional services	393.6	338.5	353.4
Amortization of intangible assets	2.8	3.6	3.6
Loss on disposal of plant	0.0	0.0	11.6
Disposal Group, Held-for-Sale, Not Discontinued Operations \| SmartDose® 3.5mL On-Body Delivery System And Associated Facilities
Segment Reporting Information [Line Items]
Charges related to sale agreement	8.4
Charges related to severance and lease impairment	6.2
Charges related to professional services	2.2
Corporate and Unallocated
Segment Reporting Information [Line Items]
Restructuring and related charges, net	23.3	2.1	(2.0)
Charges related to sale agreement	8.4	0.0	0.0
Cost investment activity	4.5	0.0	4.3
Amortization of intangible assets	0.2	0.8	0.7
Loss on disposal of plant	0.0	0.0	11.6
Corporate and Unallocated \| Other Income (Expense)
Segment Reporting Information [Line Items]
Restructuring and related charges, net	$ 18.4	$ (2.5)	$ (2.8)
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]	Charges related to severance and lease impairment	Charges related to severance and lease impairment	Charges related to severance and lease impairment
Corporate and Unallocated \| Selling, General and Administrative Expenses
Segment Reporting Information [Line Items]
Restructuring and related charges, net	$ 4.9	$ 4.6
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]	Charges related to severance and lease impairment	Charges related to professional services
Corporate and Unallocated \| Cost of goods and services sold
Segment Reporting Information [Line Items]
Restructuring and related charges, net			$ 0.8
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]			Cost of goods and services sold

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

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