XML 63 R53.htm IDEA: XBRL DOCUMENT
v3.22.2

Derivative Financial Instruments - Effects of Derivative Instruments on OCI and Earnings (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative (gain) loss recognized in income, fair value hedges | $ 1.4 | $ 0.6 | $ 2.2 | $ 1.2
Not Designated as Hedging Instrument |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative instruments not designated as hedging instruments, gain (loss), net | 0.3 | 0.7 | 3.1 | 1.1
Fair Value Hedges |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative, forward point components, (gain) loss, recognized in earnings | 0.9 | 0.6 | 1.7 | 1.2
Fair value and net investment hedges, amount of gain (loss) recognized in OCI | 1.9 | 0.2 | 0.7 | (0.4)
Fair value and net investment hedges, amount of (gain) loss reclassified from accumulated OCI into income | (1.2) | 0.4 | (1.2) | 0.8
Cash Flow Hedges: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Cash flow hedges, amount of gain (loss) recognized in OCI | (2.3) | (1.3) | (3.0) | (3.5)
Cash flow hedges, amount of (gain) loss reclassified from accumulated OCI into income | 0.7 | 2.0 | 1.0 | 2.5
Net Investment Hedges: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Fair value and net investment hedges, amount of gain (loss) recognized in OCI | 5.6 | 0.4 | 8.9 | 5.4
Fair value and net investment hedges, amount of (gain) loss reclassified from accumulated OCI into income | 0.0 | 0.0 | 0.0 | 0.0
Other (income) expense |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative (gain) loss on hedged item, fair value hedges | (11.7) | 4.8 | (21.3) | (5.1)
Derivative (gain) loss on derivative designed as hedging instrument, fair value hedges | 11.7 | (4.8) | 21.3 | 5.1
Derivative (gain) loss on amount excluded from effectiveness testing, fair value hedges | 1.4 | 0.6 | 2.2 | 1.2
Gain (loss) on derivative instruments, net, pretax | (1.2) | 0.4 | (1.2) | 0.8
Other (income) expense | Commodity call options | Not Designated as Hedging Instrument |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative instruments not designated as hedging instruments, gain (loss), net | 0.3 | 0.7 | 3.1 | 1.1
Other (income) expense | Fair Value Hedges | Foreign currency hedge contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Fair value and net investment hedges, amount of gain (loss) recognized in OCI | 1.9 | 0.2 | 0.7 | (0.4)
Fair value and net investment hedges, amount of (gain) loss reclassified from accumulated OCI into income | (1.2) | 0.4 | (1.2) | 0.8
Other (income) expense | Net Investment Hedges: | Cross-currency swap |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Fair value and net investment hedges, amount of gain (loss) recognized in OCI | 5.6 | 0.4 | 8.9 | 5.4
Fair value and net investment hedges, amount of (gain) loss reclassified from accumulated OCI into income | 0.0 | 0.0 | 0.0 | 0.0
Net sales |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Cash flow hedges, amount of gain (loss) recognized in OCI |  | (0.7) |  |
Cash flow hedges, amount of (gain) loss reclassified from accumulated OCI into income |  |  |  | 0.9
Gain (loss) on derivative instruments, net, pretax | (0.3) | 0.5 | (0.6) | 0.9
Net sales | Cash Flow Hedges: | Foreign currency hedge contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Cash flow hedges, amount of gain (loss) recognized in OCI | 0.0 | (0.4) | 0.4 | (0.7)
Cash flow hedges, amount of (gain) loss reclassified from accumulated OCI into income | (0.3) | 0.5 | (0.6) | 0.9
Cost of goods and services sold |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Cash flow hedges, amount of gain (loss) recognized in OCI |  |  |  | (2.8)
Cash flow hedges, amount of (gain) loss reclassified from accumulated OCI into income |  |  |  | 1.5
Gain (loss) on derivative instruments, net, pretax | 1.0 | 1.5 | 1.5 | 1.5
Cost of goods and services sold | Cash Flow Hedges: | Foreign currency hedge contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Cash flow hedges, amount of gain (loss) recognized in OCI | (2.3) | (0.9) | (3.4) | (2.8)
Cash flow hedges, amount of (gain) loss reclassified from accumulated OCI into income | 1.0 | 1.5 | 1.5 | 1.5
Interest expense |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on derivative instruments, net, pretax | 0.0 | 0.0 | 0.1 | 0.1
Interest expense | Cash Flow Hedges: | Forward treasury locks |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Cash flow hedges, amount of gain (loss) recognized in OCI | 0.0 | 0.0 | 0.0 | 0.0
Cash flow hedges, amount of (gain) loss reclassified from accumulated OCI into income | $ 0.0 | $ 0.0 | $ 0.1 | $ 0.1

X
- Definition Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986 + Details
Name: | us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986 + Details
Name: | us-gaap_ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) from excluded component of derivative hedge, recognized in earnings. Excludes recognition under systematic and rational method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 20 -Section 45 -Paragraph 1A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=121577181&loc=SL110061172-113977 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
Name: | us-gaap_DerivativeExcludedComponentGainLossRecognizedInEarnings
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 of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109998890-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
Name: | us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Net gain (loss) relating to components of the gain (loss) on the fair value hedging instrument excluded from the assessment of fair value hedge effectiveness. Recognized in earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986 + Details
Name: | us-gaap_GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
Name: | us-gaap_GainLossOnDerivativeInstrumentsNetPretax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
Name: | us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 20 -Section 45 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=121577181&loc=SL110061190-113977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI https://asc.fasb.org/extlink&oid=126968391&loc=d3e637-108580 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669646-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, before tax, of reclassification from accumulated other comprehensive income (AOCI) for gain (loss) from discontinuance of cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeReclassificationForDiscontinuanceBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before tax and reclassification, of gain (loss) from derivative designated and qualifying as net investment hedge. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CCC -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109998896-113959 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, before tax, of reclassification from accumulated other comprehensive income (AOCI) for gain (loss) from derivative designated and qualifying as net investment hedge. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CCC -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109998896-113959 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossReclassificationBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_FairValueHedgingMember
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_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_NetInvestmentHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
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: |

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