Restructuring, Business Transformation and Other Cost Saving Initiatives - FIt for Growth Initiative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 6.6	$ 34.4	$ 18.1	$ 44.0
2023 Cost Saving Initiatives
Restructuring Cost and Reserve [Line Items]
Severance Costs	6.3	17.8	15.6	24.9
Accelerated Depreciation and Other Costs	4.2	28.5	10.5	28.5
Restructuring charges	10.5	46.3	26.1	53.4
Reata Integration
Restructuring Cost and Reserve [Line Items]
Severance Costs	0.3		2.5
Accelerated Depreciation and Other Costs	4.8		9.3
Restructuring charges	5.1		11.8
Selling, general and administrative | 2023 Cost Saving Initiatives
Restructuring Cost and Reserve [Line Items]
Severance Costs	0.0	0.0	0.0	0.0
Accelerated Depreciation and Other Costs	2.0	11.5	3.4	11.5
Restructuring charges	2.0	11.5	3.4	11.5
Selling, general and administrative | Reata Integration
Restructuring Cost and Reserve [Line Items]
Severance Costs	0.0		0.0
Accelerated Depreciation and Other Costs	1.5		3.3
Restructuring charges	1.5		3.3
Research and development | 2023 Cost Saving Initiatives
Restructuring Cost and Reserve [Line Items]
Severance Costs	0.0	0.0	0.0	0.0
Accelerated Depreciation and Other Costs	2.2	0.5	7.1	0.5
Restructuring charges	2.2	0.5	7.1	0.5
Research and development | Reata Integration
Restructuring Cost and Reserve [Line Items]
Severance Costs	0.0		0.0
Accelerated Depreciation and Other Costs	3.3		6.0
Restructuring charges	3.3		6.0
Restructuring charges | 2023 Cost Saving Initiatives
Restructuring Cost and Reserve [Line Items]
Severance Costs	6.3	17.8	15.6	24.9
Accelerated Depreciation and Other Costs	0.0	16.5	0.0	16.5
Restructuring charges	6.3	$ 34.3	15.6	$ 41.4
Restructuring charges | Reata Integration
Restructuring Cost and Reserve [Line Items]
Severance Costs	0.3		2.5
Accelerated Depreciation and Other Costs	0.0		0.0
Restructuring charges	$ 0.3		$ 2.5