Intangible Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		$ 197.8	$ 80.8
Accumulated Amortization	[1]	19.5	13.3
Net Carrying Amount		178.3	67.5
Amortization expense of intangible assets		5.6	3.1	$ 0.6
Estimated Amortization Expense
2016		12.3
2017		11.9
2018		11.9
2019		11.8
2020		11.5
Trade names [Member] | Advanced Materials & Structures [Member]
Indefinite-lived Intangible Assets [Line Items]
Unamortized intangible assets		35.6	21.8
Customer-related intangibles [Member] | Engineered Papers [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		10.0	10.0
Accumulated Amortization	[1]	10.0	10.0
Net Carrying Amount		0.0	0.0
Customer Relationships [Member] | Advanced Materials & Structures [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		167.7	52.4
Accumulated Amortization	[1]	6.4	2.1
Net Carrying Amount		161.3	50.3
Developed Technology [Member] | Advanced Materials & Structures [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		16.0	16.0
Accumulated Amortization	[1]	2.4	1.2
Net Carrying Amount		13.6	14.8
Customer Contracts [Member] | Advanced Materials & Structures [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		0.9	0.9
Accumulated Amortization	[1]	0.5	0.0
Net Carrying Amount		0.4	0.9
Non-Compete Agreements [Member] | Advanced Materials & Structures [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		1.7	0.0
Accumulated Amortization	[1]	0.1	0.0
Net Carrying Amount		1.6	0.0
Patents [Member] | Advanced Materials & Structures [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		1.5	1.5
Accumulated Amortization	[1]	0.1	0.0
Net Carrying Amount		$ 1.4	$ 1.5

[1] Accumulated amortization also includes adjustments for foreign currency translation.