Retirement Benefits - Components of Net Periodic Benefit Cost for Defined Benefit Plans and Other Postretirement Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlement loss recognized			$ 0.9
Net periodic cost (benefit)			(1.0)
Pension Benefits | U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.1	$ 0.1	0.1
Interest cost	0.2	0.3	1.3
Expected return on plan assets	(0.2)	(0.9)	(3.8)
Settlement loss recognized	0.0	10.5	0.9
Net amortization	0.3	0.4	1.2
Net periodic cost (benefit)	0.4	10.4	(0.3)
Pension Benefits | Non-U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1.8	2.0	2.2
Interest cost	1.0	0.7	1.1
Expected return on plan assets	(1.3)	(1.0)	(1.2)
Settlement loss recognized	0.0	0.0	(0.4)
Net amortization	0.6	2.1	1.7
Net periodic cost (benefit)	2.1	3.8	3.4
Other Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.7	0.7	0.6
Interest cost	0.5	0.4	0.6
Curtailment gain recognized	0.0	(2.0)	0.0
Net amortization	(0.5)	(0.6)	(0.5)
Net periodic cost (benefit)	$ 0.7	$ (1.5)	$ 0.7