XML 67 R57.htm IDEA: XBRL DOCUMENT
v3.21.2

Derivatives - Derivatives Instruments Effect on AOCI and Results of Operations (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Derivatives designated as net investment hedge | Foreign exchange contracts | Other income (expense), net |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
(Loss) Gain Reclassified from AOCI | $ 6.3 | $ 0.3 | $ (0.3) | $ 0.5
Derivatives Designated in Hedging Relationships |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Unrealized (Loss) Gain Recognized in AOCI on Derivatives, Net of Tax | (4.2) | (6.1) | 7.2 | (6.8)
(Loss) Gain Reclassified from AOCI | (1.6) | (0.6) | (1.6) | (0.6)
Derivatives Designated in Hedging Relationships | Derivatives designated as cash flow hedge | Foreign exchange contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Unrealized (Loss) Gain Recognized in AOCI on Derivatives, Net of Tax | 0.7 | (0.8) | 0.1 | (5.8)
Derivatives Designated in Hedging Relationships | Derivatives designated as cash flow hedge | Foreign exchange contracts | Net sales |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
(Loss) Gain Reclassified from AOCI | (0.4) | (1.0) | (1.0) | (1.6)
Derivatives Designated in Hedging Relationships | Derivatives designated as cash flow hedge | Foreign exchange contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Unrealized (Loss) Gain Recognized in AOCI on Derivatives, Net of Tax | (1.0) | 0.9 | (0.1) | 1.4
Derivatives Designated in Hedging Relationships | Derivatives designated as cash flow hedge | Foreign exchange contracts | Other income (expense), net |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
(Loss) Gain Reclassified from AOCI | (1.2) | 0.4 | (0.6) | 1.0
Derivatives Designated in Hedging Relationships | Derivatives designated as cash flow hedge | Interest rate contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Unrealized (Loss) Gain Recognized in AOCI on Derivatives, Net of Tax | (2.1) | (0.8) | 2.0 | (9.0)
Derivatives Designated in Hedging Relationships | Derivatives designated as cash flow hedge | Interest rate contracts | Interest expense |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
(Loss) Gain Reclassified from AOCI | 0.0 | 0.0 | 0.0 | 0.0
Derivatives Designated in Hedging Relationships | Derivatives designated as net investment hedge | Foreign exchange contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Unrealized (Loss) Gain Recognized in AOCI on Derivatives, Net of Tax | (1.8) | (5.4) | 5.2 | 6.6
Derivatives Designated in Hedging Relationships | Derivatives designated as net investment hedge | Foreign exchange contracts | Other income (expense), net |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
(Loss) Gain Reclassified from AOCI | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsGainLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before tax and after reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness, attributable to parent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e637-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_OtherNonoperatingIncomeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=swm_ForeignExchangeContractOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=swm_ForeignExchangeContractTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_InterestExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |