Restructuring and Other Impairment Activities - Schedule of Total Restructuring, Restructuring Related, and Impairment Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2.1	$ 2.3	$ 6.9	$ 21.3
Total restructuring and other impairment expense	8.1	11.2	18.2	37.4
Unallocated
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.0	0.1	1.4	3.4
Filtration and Advanced Materials
Restructuring Cost and Reserve [Line Items]
Other impairment expense	6.0	0.0	11.3	0.0
Filtration and Advanced Materials \| Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.1	0.7	4.0	5.2
Sustainable and Adhesive Solutions
Restructuring Cost and Reserve [Line Items]
Other impairment expense	0.0	8.9	0.0	16.1
Sustainable and Adhesive Solutions \| Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.0	1.5	1.5	12.7
Severance and termination benefits \| Unallocated
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.0	0.1	1.4	3.4
Severance and termination benefits \| Filtration and Advanced Materials \| Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.7	0.3	2.8	3.8
Severance and termination benefits \| Sustainable and Adhesive Solutions \| Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.0	0.5	1.4	10.6
Other exit costs \| Unallocated
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.0	0.0	0.0	0.0
Other exit costs \| Filtration and Advanced Materials \| Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.4	0.4	1.2	1.4
Other exit costs \| Sustainable and Adhesive Solutions \| Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.0	1.0	0.1	2.1
Closed Facility \| Filtration and Advanced Materials
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.4	0.5	1.2	2.0
Restructuring incurred to date	11.4		11.4
Restructuring expected cost	$ 0.5		$ 0.5
Closed Facility \| Sustainable and Adhesive Solutions
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 0.8		$ 2.4

Mativ Holdings, Inc. 10-Q