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Target Allocations (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012
United States, Pension Benefits [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Target allocations 2014 | 100.00% |  |  |
Actual allocations | 100.00% |  | 100.00% |
United States, Pension Benefits [Member] | Cash and Cash Equivalents [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Target allocations 2014 | 0.00% |  |  |
Actual allocations | 3.00% |  | 1.00% |
United States, Pension Benefits [Member] | Domestic Large Cap [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Target allocations 2014 | 25.00% | [1] |  |
Actual allocations | 25.00% | [1] | 25.00% | [1]
United States, Pension Benefits [Member] | Domestic Small Cap [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Target allocations 2014 | 10.00% | [1] |  |
Actual allocations | 8.00% | [1] | 7.00% | [1]
United States, Pension Benefits [Member] | International [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Target allocations 2014 | 15.00% | [1] |  |
Actual allocations | 12.00% | [1] | 10.00% | [1]
United States, Pension Benefits [Member] | Fixed Income Securities [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Target allocations 2014 | 40.00% |  |  |
Actual allocations | 47.00% |  | 52.00% |
United States, Pension Benefits [Member] | Alternative Investment [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Target allocations 2014 | 10.00% | [2] |  |
Actual allocations | 5.00% | [2] | 5.00% | [2]
France, Pension Benefits [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Target allocations 2014 | 100.00% |  |  |
Actual allocations | 100.00% |  | 100.00% |
France, Pension Benefits [Member] | Cash and Cash Equivalents [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Target allocations 2014 | 5.00% |  |  |
Actual allocations | 25.00% |  | 23.00% |
France, Pension Benefits [Member] | Domestic Large Cap [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Target allocations 2014 | 25.00% | [1] |  |
Actual allocations | 19.00% | [1] | 20.00% | [1]
France, Pension Benefits [Member] | Fixed Income Securities [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Target allocations 2014 | 65.00% |  |  |
Actual allocations | 55.00% |  | 54.00% |
France, Pension Benefits [Member] | Alternative Investment [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Target allocations 2014 | 5.00% | [2] |  |
Actual allocations | 1.00% | [2] | 3.00% | [2]
[1] | Target allocation for equity securities under the French pension plan does not differentiate types of equity securities. None of the Company's pension plan assets are targeted for investment in SWM stock, except that it is possible that one or more mutual funds held by the plan could hold shares of SWM.
[2] | Investments in this category under the U.S. pension plan only may include hedge funds, and may include real estate under the French pension plan.

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- Definition Target allocation of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2446-114920 + Details
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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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