Post-Employment Plans - Changes in Fair Value of Level 3 Pension Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	$ 134.6
Fair value of plan assets at end of period	150.4	$ 134.6
Level 3
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	46.2	63.3
Actual return on plan assets	6.2	(15.8)
Purchases, sales and settlements, net	0.5	1.5
Foreign exchange	1.4	(2.8)
Fair value of plan assets at end of period	$ 54.3	$ 46.2