Goodwill and Other Intangible Assets - Other intangible assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Net identifiable intangible assets	$ 70.7	$ 78.7
Amortizable intangible assets, gross amount	60.3	61.6
Accumulated Amortization	(27.4)	(20.9)
Total gross intangible assets	98.1	99.6
Aggregate amortization expense of acquired intangible assets	4.3	3.7	$ 3.9
Estimated annual amortization expense
2019	3.8
2020	3.6
2021	3.4
2022	2.7
2023	2.5
Trade names
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Non-amortizable, gross amount	37.8	38.0
Customer based intangibles
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Amortizable intangible assets, gross amount	38.3	39.2
Accumulated Amortization	(18.2)	(14.7)
Trade names and trademarks
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Amortizable intangible assets, gross amount	5.1	5.2
Accumulated Amortization	(2.5)	(2.3)
Acquired technology
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Amortizable intangible assets, gross amount	16.9	17.2
Accumulated Amortization	(6.7)	(3.9)
W.A. Sanders Coldenhove Holding B.V.
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Intangible assets-definite lived		4.7
Non-amortizable trade names		1.2
Total intangible assets		5.9
W.A. Sanders Coldenhove Holding B.V. | Customer based intangibles
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Intangible assets-definite lived		$ 2.9
Estimated Useful Lives (Years)		15 years
W.A. Sanders Coldenhove Holding B.V. | Trade names and trademarks
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Intangible assets-definite lived		$ 0.5
Estimated Useful Lives (Years)		10 years
W.A. Sanders Coldenhove Holding B.V. | Acquired technology
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Intangible assets-definite lived		$ 1.3
Estimated Useful Lives (Years)		4 years
Technical Products
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Net identifiable intangible assets	45.8
Fine Paper and Packaging
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Net identifiable intangible assets	24.0
Other
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Net identifiable intangible assets	$ 0.9