Retirement Benefits - Amounts in Accumulated Other Comprehensive Income Loss Expected to be Recognized as Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Pension Benefits | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prior service cost (credit)	$ 0.2	$ 0.1
Net loss (gain)	2.7	1.9
Total	2.9	2.0
Pension Benefits | Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prior service cost (credit)	(0.4)	(0.5)
Net loss (gain)	1.8	(5.5)
Total	1.4	(6.0)
Other Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prior service cost (credit)	(0.3)	(0.4)
Net loss (gain)	(8.6)	(9.9)
Total	$ (8.9)	$ (10.3)