Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Difference between the effective income tax provision rate and the U.S. federal statutory income tax provision rate
U.S. federal statutory income tax rate (as a percent)	35.00%	35.00%	35.00%
U.S. state income taxes, net of federal income tax benefit (as a percent)	1.90%	2.10%	2.10%
Tax on foreign dividends (as a percent)	(4.50%)	(3.60%)	(3.00%)
Foreign tax rate differences (as a percent)	(2.70%)	(2.20%)	(2.80%)
Foreign financing structure (as a percent)	(1.60%)	(1.30%)	(2.50%)
Excess tax benefits from stock compensation (as a percent)	(3.00%)	(0.00%)	(0.00%)
Research and development and other tax credits (as a percent)	(2.80%)	(3.90%)	(31.90%)
Domestic production activities deduction (as a percent)	(1.50%)	(2.20%)	(0.00%)
Uncertain income tax positions (as a percent)	(0.40%)	1.30%	6.50%
Other differences - net (as a percent)	(0.70%)	0.30%	0.50%
Effective income tax rate (as a percent)	28.70%	32.70%	9.90%
Difference between the effective income tax provision and the U.S. federal statutory income tax provision
U.S. federal statutory income tax rate	$ 36.1	$ 31.5	$ 26.4
U.S. state income taxes, net of federal income tax benefit	2.0	1.9	1.6
Tax on foreign dividends	(4.6)	(3.2)	(2.3)
Foreign tax rate differences	(2.8)	(2.0)	(2.1)
Benefit of tax structure	(1.7)	(1.2)	(1.9)
Excess tax benefits from stock compensation	(3.1)	0.0	0.0
Research and development and other credits	(2.9)	(3.5)	(24.1)
Domestic production activities deduction	(1.5)	(2.0)	0.0
Uncertain tax positions	(0.4)	1.2	4.9
Other differences - net	(0.7)	0.3	0.4
Total provision for income taxes	$ 29.6	29.4	7.5
FiberMark
Difference between the effective income tax provision and the U.S. federal statutory income tax provision
Research and development and other credits		$ (1.4)
Tax Year 2005 - 2013
Difference between the effective income tax provision and the U.S. federal statutory income tax provision
Research and development and other credits			$ (21.9)