Restructuring and Related Impairment Charges (Summary of Restructuring and Related Costs) (Details) $ in Millions	Dec. 31, 2022 USD ($)
Restructuring Cost and Reserve [Line Items]
Costs incurred for the year ended December 31, 2022	$ 52.9
Estimated Remaining Costs	11.7
Estimated Total Costs	64.6
Transformation Plan
Restructuring Cost and Reserve [Line Items]
Costs incurred for the year ended December 31, 2022	31.7
Estimated Remaining Costs	3.3
Estimated Total Costs	35.0
Return to Work Strategy
Restructuring Cost and Reserve [Line Items]
Costs incurred for the year ended December 31, 2022	21.2
Estimated Remaining Costs	8.4
Estimated Total Costs	29.6
Severance and other employee benefits | Transformation Plan
Restructuring Cost and Reserve [Line Items]
Costs incurred for the year ended December 31, 2022	31.7
Estimated Remaining Costs	3.3
Estimated Total Costs	35.0
Contract exit costs | Return to Work Strategy
Restructuring Cost and Reserve [Line Items]
Costs incurred for the year ended December 31, 2022	15.5
Estimated Remaining Costs	5.6
Estimated Total Costs	21.1
Fixed asset impairment | Return to Work Strategy
Restructuring Cost and Reserve [Line Items]
Costs incurred for the year ended December 31, 2022	1.1
Estimated Remaining Costs	0.0
Estimated Total Costs	1.1
Right-of-use asset impairment | Return to Work Strategy
Restructuring Cost and Reserve [Line Items]
Costs incurred for the year ended December 31, 2022	4.6
Estimated Remaining Costs	2.8
Estimated Total Costs	$ 7.4