Goodwill and Other Intangible Assets - Other intangible assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Net identifiable intangible assets	$ 66.7	$ 70.7
Amortizable intangible assets, gross amount	60.2	60.3
Accumulated Amortization	(31.1)	(27.4)
Total gross intangible assets	97.8	98.1
Aggregate amortization expense of acquired intangible assets	3.9	4.3	$ 3.7
Estimated annual amortization expense
2020	3.7
2021	3.5
2022	2.9
2023	2.7
2024	2.7
Trade names
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Non-amortizable, gross amount	37.6	37.8
Customer based intangibles
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Amortizable intangible assets, gross amount	38.2	38.3
Accumulated Amortization	(20.4)	(18.2)
Trade names and trademarks
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Amortizable intangible assets, gross amount	5.1	5.1
Accumulated Amortization	(2.7)	(2.5)
Acquired technology
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Amortizable intangible assets, gross amount	16.9	16.9
Accumulated Amortization	(8.0)	$ (6.7)
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	43.1
Fine Paper and Packaging
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Net identifiable intangible assets	$ 23.6