Restructuring Expenses and Impairment Charges (Restructuring Expense Activity) (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	$ 11.2	$ 7.2	$ 6.8	$ 10.6	$ 14.1	$ 14.7	$ 6.8	$ 14.7
Quarterly provision	0.8	6.1	1.4	1.0	0.8	3.0	8.3	4.4
Quarterly provision reversal					(0.4)
Quarterly cash activity	(4.8)	(1.7)	(1.0)	(3.4)	(3.3)	(3.4)
Foreign currency translation	(0.7)	(0.4)		(0.6)	(0.6)	(0.2)
Restructuring reserve, end of period	6.5	11.2	7.2	7.6	10.6	14.1	6.5	7.6
Employee Severance
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	9.2	7.2	6.8	10.3	13.8	14.5	6.8	14.5
Quarterly provision	0.8	4.1	1.4	1.0	0.8	3.0
Quarterly provision reversal					(0.4)
Quarterly cash activity	(2.8)	(1.7)	(1.0)	(3.4)	(3.3)	(3.4)
Foreign currency translation	(0.7)	(0.4)		(0.6)	(0.6)	(0.3)
Restructuring reserve, end of period	6.5	9.2	7.2	7.3	10.3	13.8	6.5	7.3
Other Related Closure Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	2.0	0.0	0.0	0.3	0.3	0.2	0.0	0.2
Quarterly provision	0.0	2.0	0.0	0.0	0.0	0.0
Quarterly provision reversal					0.0
Quarterly cash activity	(2.0)	0.0	0.0	0.0	0.0	0.0
Foreign currency translation	0.0	0.0		0.0	0.0	0.1
Restructuring reserve, end of period	$ 0.0	$ 2.0	$ 0.0	$ 0.3	$ 0.3	$ 0.3	$ 0.0	$ 0.3