Employee Benefit Plans - Changes in Plan Assets and Projected Benefit Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure
Net actuarial (gain) loss	$ 5.8	$ (1.7)	$ 5.9
Net amortization	6.7	(1.2)	$ 6.9
Net current-period other comprehensive income, net of taxes	68.8	(36.3)
United States
Defined Benefit Plan Disclosure
Net actuarial (gain) loss	(5.9)	1.7
Net amortization	(0.9)	(0.5)
Effect of foreign exchange rates	0.0	0.0
Net current-period other comprehensive income, net of taxes	(6.8)	$ 1.2
International Plans
Defined Benefit Plan Disclosure
Net actuarial (gain) loss	0.1
Net amortization	0.0
Effect of foreign exchange rates	4.7
Net current-period other comprehensive income, net of taxes	$ 4.8