Segment Information (Tables)

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segments

($ in millions)	Net Sales
	For the Years Ended December 31,
	2021				2020				2019
Advanced Materials & Structures	$	930.7	64.6	%	$	543.5	50.6	%	$	477.2	46.7	%
Engineered Papers	509.3		35.4		530.9		49.4		545.6		53.3
Consolidated	$	1,440.0	100.0	%	$	1,074.4	100.0	%	$	1,022.8	100.0	%

($ in millions)	Operating Profit
	For the Years Ended December 31,
	2021				2020				2019
Advanced Materials & Structures	$	61.6	73.9	%	$	64.8	50.3	%	$	64.3	48.0	%
Engineered Papers	100.5		120.6		116.8		90.7		119.2		89.0
Unallocated	(78.8)		(94.6)		(52.8)		(41.0)		(49.5)		(37.0)
Consolidated	$	83.3	99.9	%	$	128.8	100.0	%	$	134.0	100.0	%

($ in millions)	Capital Spending						Depreciation
	2021		2020		2019		2021		2020		2019
Advanced Materials & Structures	$	19.5	$	14.5	$	16.1	$	25.9	$	14.5	$	12.8
Engineered Papers	16.4		15.5		12.0		21.7		27.5		22.8
Unallocated	—		0.1		0.5		0.2		0.2		0.2
Consolidated	$	35.9	$	30.1	$	28.6	$	47.8	$	42.2	$	35.8

Net Sales Attributed to Geographic Locations Based on the Location of the Company's Direct Customers

Long-lived assets by geographic area as of year-end were as follows ($ in millions):

	Long-Lived Assets
	2021		2020		2019
U.S.	$	173.9	$	122.1	$	118.5
France	169.1		169.3		158.8
U.K.	65.4		10.3		9.9
Brazil	15.3		15.2		19.5
Poland	10.4		12.9		14.7
Other foreign countries	43.7		22.1		20.8
Consolidated	$	477.8	$	351.9	$	342.2