Restructuring and Other (Income) Charges, net - Restructuring (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Restructuring Cost and Reserve [Line Items]
Performance Chemicals repositioning	$ 12.2	$ 10.0	$ 23.3	$ 72.3
Other	9.7		10.9
Restructuring charges	21.9	10.0	34.2	72.3
Severance and other employee-related costs
Restructuring Cost and Reserve [Line Items]
Performance Chemicals repositioning	0.0	1.0	0.0	3.1
Other	1.7		2.5
Restructuring charges	1.7	1.0	2.5	3.1
Other charges (income)
Restructuring Cost and Reserve [Line Items]
Performance Chemicals repositioning	8.9	7.2	20.1	12.4
Other	3.7		4.0
Restructuring charges	12.6	7.2	24.1	12.4
Asset disposal charges
Restructuring Cost and Reserve [Line Items]
Performance Chemicals repositioning	3.3	1.8	3.2	56.8
Other	4.3		4.4
Restructuring charges	$ 7.6	$ 1.8	$ 7.6	$ 56.8