Special Items - Restructuring Accruals (Details) - Employee Severance - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Restructuring accruals, beginning balance	$ 26.5	$ 47.1	$ 25.6
Charges incurred and changes in estimates	11.7	67.6	52.4
Payments made	(25.7)	(88.4)	(31.1)
Foreign currency and other adjustments	(0.1)	0.2	0.2
Restructuring accruals, ending balance	12.4	26.5	47.1
Americas
Restructuring Reserve [Roll Forward]
Restructuring accruals, beginning balance	24.5	42.6	24.5
Charges incurred and changes in estimates	10.1	59.1	43.4
Payments made	(23.7)	(77.3)	(25.5)
Foreign currency and other adjustments	0.0	0.1	0.2
Restructuring accruals, ending balance	10.9	24.5	42.6
EMEA&APAC
Restructuring Reserve [Roll Forward]
Restructuring accruals, beginning balance	2.0	4.5	1.1
Charges incurred and changes in estimates	1.6	8.5	9.0
Payments made	(2.0)	(11.1)	(5.6)
Foreign currency and other adjustments	(0.1)	0.1	0.0
Restructuring accruals, ending balance	$ 1.5	$ 2.0	$ 4.5