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

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- Definition

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

+ References

No definition available.

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

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-Name Regulation S-X (SX)

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-Name Regulation S-X (SX)

-Number 210

-Section 02

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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- Definition

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

-SubTopic 10

-Section 50

-Paragraph 41

-Subparagraph (b)

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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

The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

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-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

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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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-03.1(a))

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014 segment	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of Operating Segments									3us-gaap_NumberOfOperatingSegments
Net Sales [Abstract]
Net Sales	$ 181.7us-gaap_SalesRevenueGoodsNet	$ 204.3us-gaap_SalesRevenueGoodsNet	$ 203.6us-gaap_SalesRevenueGoodsNet	$ 204.7us-gaap_SalesRevenueGoodsNet	$ 196.5us-gaap_SalesRevenueGoodsNet	$ 185.3us-gaap_SalesRevenueGoodsNet	$ 196.5us-gaap_SalesRevenueGoodsNet	$ 194.5us-gaap_SalesRevenueGoodsNet	$ 794.3us-gaap_SalesRevenueGoodsNet	$ 772.8us-gaap_SalesRevenueGoodsNet	$ 778.5us-gaap_SalesRevenueGoodsNet
Percentage of Net Sales									100.00%swm_SalesRevenueNetPercentage	100.00%swm_SalesRevenueNetPercentage	100.00%swm_SalesRevenueNetPercentage
Operating Profit [Abstract]
Operating Profit (loss)	17.3us-gaap_OperatingIncomeLoss	25.2us-gaap_OperatingIncomeLoss	30.5us-gaap_OperatingIncomeLoss	33.1us-gaap_OperatingIncomeLoss	(0.7)us-gaap_OperatingIncomeLoss	41.8us-gaap_OperatingIncomeLoss	42.1us-gaap_OperatingIncomeLoss	41.7us-gaap_OperatingIncomeLoss	106.1us-gaap_OperatingIncomeLoss	124.9us-gaap_OperatingIncomeLoss	151.7us-gaap_OperatingIncomeLoss
Percentage of Operating Profit									100.00%swm_OperatingProfitPercentage	100.00%swm_OperatingProfitPercentage	100.00%swm_OperatingProfitPercentage
Segment Assets	1,186.6us-gaap_Assets				1,226.8us-gaap_Assets				1,186.6us-gaap_Assets	1,226.8us-gaap_Assets
Capital Spending									35.1	29.1	27.2
Depreciation									35.3us-gaap_Depreciation	31.1us-gaap_Depreciation	30.8us-gaap_Depreciation
Europe and the former Commonwealth of Independent States [Member]
Net Sales [Abstract]
Net Sales									304.6	343.0	349.4
United States [Member]
Net Sales [Abstract]
Net Sales									263.7	223.1	227.2
Operating Profit [Abstract]
Long-Lived Assets	75.5				86.8				75.5	86.8
France [Member]
Operating Profit [Abstract]
Long-Lived Assets	187.2				210.2				187.2	210.2
Philippines [Member]
Operating Profit [Abstract]
Long-Lived Assets	30.8				31.5				30.8	31.5
Brazil [Member]
Operating Profit [Abstract]
Long-Lived Assets	27.8				35.1				27.8	35.1
Poland [Member]
Operating Profit [Abstract]
Long-Lived Assets	29.0				32.8				29.0	32.8
Asia/Pacific (including China) [Member]
Net Sales [Abstract]
Net Sales									125.3	113.6	107.4
Latin America [Member]
Net Sales [Abstract]
Net Sales									54.9	49.6	54.2
Other foreign countries [Member]
Net Sales [Abstract]
Net Sales									45.8	43.5	40.3
Operating Profit [Abstract]
Long-Lived Assets	15.5				3.6				15.5	3.6
Paper [Member]
Net Sales [Abstract]
Net Sales									496.3	543.4	545.0
Percentage of Net Sales									62.50%	70.30%	70.00%
Operating Profit [Abstract]
Operating Profit (loss)									74.5	102.5	84.4
Percentage of Operating Profit									70.20%	82.10%	55.70%
Segment Assets	425.6				462.4				425.6	462.4
Capital Spending									20.3	19.8	19.8
Depreciation									20.9	20.0	20.0
Reconstituted Tobacco [Member]
Net Sales [Abstract]
Net Sales									170.6	225.2	233.5
Percentage of Net Sales									21.50%	29.10%	30.00%
Operating Profit [Abstract]
Operating Profit (loss)									50.0	46.4	90.3
Percentage of Operating Profit									47.10%	37.10%	59.50%
Segment Assets	186.3				411.4				186.3	411.4
Capital Spending									5.8	8.6	7.4
Depreciation									10.1	10.5	10.0
Filtration [Member]
Net Sales [Abstract]
Net Sales									127.4	4.2	0
Percentage of Net Sales									16.00%	0.60%	0.00%
Operating Profit [Abstract]
Operating Profit (loss)									10.2	(1.1)	0
Percentage of Operating Profit									9.60%	(0.90%)	0.00%
Segment Assets	319.5				286.3				319.5	286.3
Capital Spending									8.7	0.7	0
Depreciation									3.9	0.1	0
Unallocated [Member]
Operating Profit [Abstract]
Operating Profit (loss)									(28.6)	(22.9)	(23.0)
Percentage of Operating Profit									(26.90%)	(18.30%)	(15.20%)
Segment Assets	255.2				66.7				255.2	66.7
Capital Spending									0.3	0	0
Depreciation									$ 0.4	$ 0.5	$ 0.8