XML 41 R35.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Postretirement and Other Benefits Pension and OPEB Benefits (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2015
Postretirement and Other Benefits [Abstract] |
Schedule of Net Benefit Costs | The components of net pension and OPEB benefit costs for U.S. employees and net pension benefit costs for French employees during the three or six months ended June 30, 2015 and 2014 were as follows ($ in millions):
| Three Months Ended June 30,
| U.S. Pension Benefits |  | French Pension Benefits |  | U.S. OPEB Benefits
| 2015 |  | 2014 |  | 2015 |  | 2014 |  | 2015 |  | 2014
Service cost | $ | — |  |  | $ | — |  |  | $ | 0.3 |  |  | $ | 0.4 |  |  | $ | — |  |  | $ | — |
Interest cost | 1.3 |  |  | 1.1 |  |  | 0.1 |  |  | 0.2 |  |  | — |  |  | 0.1 |
Expected return on plan assets | (1.7 | ) |  | (2.2 | ) |  | — |  |  | (0.1 | ) |  | — |  |  | — |
Amortizations and other | 1.4 |  |  | 1.2 |  |  | 0.3 |  |  | 0.2 |  |  | (0.1 | ) |  | (0.2 | )
Net periodic benefit cost | $ | 1.0 |  |  | $ | 0.1 |  |  | $ | 0.7 |  |  | $ | 0.7 |  |  | $ | (0.1 | ) |  | $ | (0.1 | )
| Six Months Ended June 30,
| U.S. Pension Benefits |  | French Pension Benefits |  | U.S. OPEB Benefits
| 2015 |  | 2014 |  | 2015 |  | 2014 |  | 2015 |  | 2014
Service cost | $ | — |  |  | $ | — |  |  | $ | 0.6 |  |  | $ | 0.7 |  |  | $ | — |  |  | $ | — |
Interest cost | 2.6 |  |  | 2.8 |  |  | 0.2 |  |  | 0.4 |  |  | — |  |  | 0.1 |
Expected return on plan assets | (3.5 | ) |  | (3.7 | ) |  | (0.1 | ) |  | (0.2 | ) |  | — |  |  | — |
Amortizations and other | 2.8 |  |  | 2.2 |  |  | 0.6 |  |  | 0.5 |  |  | (0.2 | ) |  | (0.3 | )
Net periodic benefit cost | $ | 1.9 |  |  | $ | 1.3 |  |  | $ | 1.3 |  |  | $ | 1.4 |  |  | $ | (0.2 | ) |  | $ | (0.2 | )

X
- Definition Postretirement and Other Benefits [Abstract] + References No definition available. + Details
Name: | swm_PostretirementAndOtherBenefitsAbstract
Namespace Prefix: | swm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + 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 (h) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration