XML 62 R52.htm IDEA: XBRL DOCUMENT
v3.22.2

Derivative Financial Instruments - Foreign Exchange Rate and Commodity Price Risk (Details) € in Millions, ¥ in Millions, $ in Millions, $ in Millions | 6 Months Ended | 44 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2022 SGD ($) $ / bbl bbl | Jun. 30, 2021 bbl | Jun. 30, 2022 USD ($) $ / bbl | Jun. 30, 2022 EUR (€) $ / bbl | Jun. 30, 2022 JPY (¥) $ / bbl | Dec. 31, 2021 SGD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 JPY (¥)
Foreign Exchange Forward |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative contract term | 18 months |  |  |  |  |  |  |  |
Options Held |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, nonmonetary notional amount, volume | bbl | 257,999 | 784,299 |  |  |  |  |  |  |
Derivative, average price risk option strike price | $ / bbl | 107.02 |  | 107.02 | 107.02 | 107.02 |  |  |  |
SGD | Forward Contracts | Intercompany Loans | Fair Value Hedges |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount | $ 601.5 |  |  |  |  | $ 601.5 |  |  |
SGD | Forward Contracts | Intercompany Payables | Fair Value Hedges |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | $ 33.2 |  |  |  |  |  |
SGD | Foreign Exchange Forward | Long | Designated as Hedging Instrument |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount | $ 91.3 |  |  |  |  |  |  |  |
SGD | Foreign Exchange Forward | Short | Designated as Hedging Instrument |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | 45.3 | € 20.4 |  |  |  |  |
USD | Forward Contracts | Intercompany Loans | Fair Value Hedges |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | 13.4 |  |  |  | $ 13.4 |  |
USD | Foreign Exchange Forward | Long | Designated as Hedging Instrument |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | 16.0 |  |  |  |  |  |
USD | Foreign Exchange Forward | Short | Designated as Hedging Instrument |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | 0.0 | 13.9 |  |  |  |  |
USD | Cross Currency Interest Rate Contract |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  |  | $ 84.4 |
USD | Cross Currency Interest Rate Contract | Net Investment Hedges: |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  |  | $ 90.0 |
JPY | Foreign Exchange Forward | Long | Designated as Hedging Instrument |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount | ¥ |  |  |  |  | ¥ 5,786.7 |  |  |  |
JPY | Foreign Exchange Forward | Short | Designated as Hedging Instrument |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | $ 24.0 | € 22.3 |  |  |  |  |
JPY | Cross Currency Interest Rate Contract |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount | ¥ |  |  |  |  |  |  |  |  | ¥ 9,200.0

X
- Definition The average strike price on the group of price risk option contracts such as put options or call options. + References No definition available. + Details
Name: | us-gaap_DerivativeAveragePriceRiskOptionStrikePrice
Namespace Prefix: | us-gaap_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

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_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal volume used to calculate payments on a derivative instrument. + References No definition available. + Details
Name: | us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Details
Name: | srt_CurrencyAxis=currency_SGD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FairValueByLiabilityClassAxis=wst_IntercompanyLoansMember
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_FairValueByLiabilityClassAxis=wst_IntercompanyPayablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PositionAxis=us-gaap_LongMember
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_PositionAxis=us-gaap_ShortMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_USD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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