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Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 segment	Mar. 31, 2014
Segment Reporting Information [Line Items]
Number of Operating Segments	3us-gaap_NumberOfOperatingSegments
Net Sales [Abstract]
Net Sales	$ 188.0us-gaap_SalesRevenueGoodsNet	$ 204.7us-gaap_SalesRevenueGoodsNet
Percentage of Net Sales (in hundredths)	100.00%swm_SalesRevenueNetPercentage	100.00%swm_SalesRevenueNetPercentage
Operating Profit [Abstract]
Operating Profit	22.5us-gaap_OperatingIncomeLoss	33.1us-gaap_OperatingIncomeLoss
Operating Profit (in hundredths)	100.00%swm_OperatingProfitPercentage	100.00%swm_OperatingProfitPercentage
Paper [Member]
Net Sales [Abstract]
Net Sales	108.6us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = swm_PaperSegmentMember	128.8us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = swm_PaperSegmentMember
Percentage of Net Sales (in hundredths)	57.80%swm_SalesRevenueNetPercentage / us-gaap_StatementBusinessSegmentsAxis = swm_PaperSegmentMember	62.90%swm_SalesRevenueNetPercentage / us-gaap_StatementBusinessSegmentsAxis = swm_PaperSegmentMember
Operating Profit [Abstract]
Operating Profit	16.1us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = swm_PaperSegmentMember	22.5us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = swm_PaperSegmentMember
Operating Profit (in hundredths)	71.60%swm_OperatingProfitPercentage / us-gaap_StatementBusinessSegmentsAxis = swm_PaperSegmentMember	68.00%swm_OperatingProfitPercentage / us-gaap_StatementBusinessSegmentsAxis = swm_PaperSegmentMember
Reconstituted Tobacco [Member]
Net Sales [Abstract]
Net Sales	38.9us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = swm_ReconstitutedTobaccoMember	44.2us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = swm_ReconstitutedTobaccoMember
Percentage of Net Sales (in hundredths)	20.70%swm_SalesRevenueNetPercentage / us-gaap_StatementBusinessSegmentsAxis = swm_ReconstitutedTobaccoMember	21.60%swm_SalesRevenueNetPercentage / us-gaap_StatementBusinessSegmentsAxis = swm_ReconstitutedTobaccoMember
Operating Profit [Abstract]
Operating Profit	10.9us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = swm_ReconstitutedTobaccoMember	16.2us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = swm_ReconstitutedTobaccoMember
Operating Profit (in hundredths)	48.40%swm_OperatingProfitPercentage / us-gaap_StatementBusinessSegmentsAxis = swm_ReconstitutedTobaccoMember	48.90%swm_OperatingProfitPercentage / us-gaap_StatementBusinessSegmentsAxis = swm_ReconstitutedTobaccoMember
Filtration [Member]
Net Sales [Abstract]
Net Sales	40.5us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = swm_FiltrationSegmentMember	31.7us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = swm_FiltrationSegmentMember
Percentage of Net Sales (in hundredths)	21.50%swm_SalesRevenueNetPercentage / us-gaap_StatementBusinessSegmentsAxis = swm_FiltrationSegmentMember	15.50%swm_SalesRevenueNetPercentage / us-gaap_StatementBusinessSegmentsAxis = swm_FiltrationSegmentMember
Operating Profit [Abstract]
Operating Profit	2.6us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = swm_FiltrationSegmentMember	0.4us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = swm_FiltrationSegmentMember
Operating Profit (in hundredths)	11.60%swm_OperatingProfitPercentage / us-gaap_StatementBusinessSegmentsAxis = swm_FiltrationSegmentMember	1.20%swm_OperatingProfitPercentage / us-gaap_StatementBusinessSegmentsAxis = swm_FiltrationSegmentMember
Unallocated Amount to Segment [Member]
Operating Profit [Abstract]
Operating Profit	$ (7.1)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_MaterialReconcilingItemsMember	$ (6.0)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_MaterialReconcilingItemsMember
Operating Profit (in hundredths)	(31.60%)swm_OperatingProfitPercentage / us-gaap_StatementBusinessSegmentsAxis = us-gaap_MaterialReconcilingItemsMember	(18.10%)swm_OperatingProfitPercentage / us-gaap_StatementBusinessSegmentsAxis = us-gaap_MaterialReconcilingItemsMember

X

- Definition

The percentage of segment operating profit contribution to total operating profit.

+ References

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- Definition

The percentage of net product revenue to total net revenue from the sale of goods.

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(a))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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