Restructuring, Business Transformation and Other Cost Saving Initiatives - Total Charges cost saving initiative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 218.8	$ 131.1	$ 0.0
Severance Costs | 2022 Cost Saving Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(2.2)	112.6
Severance Costs | 2022 Cost Saving Initiative | Restructuring charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(2.2)	112.6
Accelerated Depreciation and Other Costs | 2022 Cost Saving Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges		2.6	18.5
Accelerated Depreciation and Other Costs | 2022 Cost Saving Initiative | Restructuring charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges		2.6	18.5
Gain (Loss) on Termination of Lease	$ 5.3
Workforce Reduction
Restructuring Cost and Reserve [Line Items]
Restructuring charges		181.6	112.6
Workforce Reduction | 2022 Cost Saving Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges		0.4	131.1
Workforce Reduction | 2022 Cost Saving Initiative | Restructuring charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 0.4	$ 131.1