$WST
WEST PHARMACEUTICAL SERVICES INC Stock $wst

$wst Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000162828022003342 Filed on February 22, 2022

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue	$730.8M	$2.832B	$580.2M
YoY Change	25.96%	31.89%	23.29%
Cost Of Revenue	$428.3M	$1.656B	$369.1M
YoY Change	16.04%	20.06%	16.29%
Gross Profit	$302.5M	$1.176B	$211.1M
YoY Change	43.3%	53.14%	37.79%
Gross Profit Margin	41.39%	41.52%	36.38%
Selling, General & Admin	$97.10M	$362.8M	$76.30M
YoY Change	27.26%	20.13%	10.58%
% of Gross Profit	32.1%	30.86%	36.14%
Research & Development	$13.70M	$52.80M	$12.90M
YoY Change	6.2%	12.58%	26.47%
% of Gross Profit	4.53%	4.49%	6.11%
Depreciation & Amortization	$34.40M	$122.3M	$28.50M
YoY Change	20.7%	12.1%	8.37%
% of Gross Profit	11.37%	10.4%	13.5%
Operating Expenses	$114.2M	$415.6M	$91.40M
YoY Change	24.95%	19.12%	23.51%
Operating Profit	$188.3M	$752.3M	$119.7M
YoY Change	57.31%	84.89%	51.14%
Interest Expense	-$3.400M	$8.200M	-$4.900M
YoY Change	-30.61%	0.0%	512.5%
% of Operating Profit	-1.81%	1.09%	-4.09%
Other Income/Expense, Net	$1.400M	-$3.400M	$900.0K
YoY Change	55.56%	-39.29%	800.0%
Pretax Income	$181.9M	$420.0M	$115.1M
YoY Change	58.04%	85.02%	48.71%
Income Tax	$34.20M	$107.2M	$20.40M
% Of Pretax Income	18.8%	25.52%	17.72%
Net Earnings	$147.7M	$661.8M	$98.40M
YoY Change	50.1%	91.16%	53.99%
Net Earnings / Revenue	20.21%	23.37%	16.96%
Basic Earnings Per Share		$8.89	$1.32
Diluted Earnings Per Share	$1.898M	$8.67	$1.29
COMMON SHARES
Basic Shares Outstanding	74.08M shares	74.40M shares	73.93M shares
Diluted Shares Outstanding		76.30M shares

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$762.6M	$762.6M	$615.5M
YoY Change	23.9%	23.9%	40.17%
Cash & Equivalents	$762.6M	$762.6M	$615.5M
Short-Term Investments
Other Short-Term Assets	$112.0M	$112.0M	$51.60M
YoY Change	117.05%	117.05%	-20.12%
Inventory	$378.4M	$378.4M	$321.3M
Prepaid Expenses
Receivables	$489.0M	$489.0M	$385.3M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.742B	$1.742B	$1.374B
YoY Change	26.81%	26.81%	29.75%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.058B	$1.127B	$943.2M
YoY Change	12.12%	11.4%	12.38%
Goodwill	$109.9M		$111.1M
YoY Change	-1.08%		3.06%
Intangibles	$23.00M		$30.50M
YoY Change	-24.59%		2.35%
Long-Term Investments	$201.2M	$207.7M	$201.9M
YoY Change	-0.35%	-3.26%	12.6%
Other Assets	$39.20M	$104.4M	$23.40M
YoY Change	67.52%	99.62%	-5.26%
Total Long-Term Assets	$1.572B	$1.572B	$1.420B
YoY Change	10.68%	10.68%	10.71%
TOTAL ASSETS
Total Short-Term Assets	$1.742B	$1.742B	$1.374B
Total Long-Term Assets	$1.572B	$1.572B	$1.420B
Total Assets	$3.314B	$3.314B	$2.794B
YoY Change	18.61%	18.61%	19.32%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$232.2M	$232.2M	$213.1M
YoY Change	8.96%	8.96%	35.91%
Accrued Expenses	$128.0M	$195.4M	$118.4M
YoY Change	8.11%	22.74%	39.62%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$44.20M	$44.20M	$2.300M
YoY Change	1821.74%	1821.74%	0.0%
Total Short-Term Liabilities	$594.1M	$594.1M	$503.4M
YoY Change	18.02%	18.02%	47.37%
LONG-TERM LIABILITIES
Long-Term Debt	$208.8M	$208.8M	$252.9M
YoY Change	-17.44%	-17.44%	-0.82%
Other Long-Term Liabilities	$38.20M	$170.6M	$31.80M
YoY Change	20.13%	-1.16%	35.9%
Total Long-Term Liabilities	$247.0M	$379.4M	$284.7M
YoY Change	-13.24%	-10.83%	2.26%
TOTAL LIABILITIES
Total Short-Term Liabilities	$594.1M	$594.1M	$503.4M
Total Long-Term Liabilities	$247.0M	$379.4M	$284.7M
Total Liabilities	$978.4M	$978.4M	$939.3M
YoY Change	4.16%	4.16%	22.27%
SHAREHOLDERS EQUITY
Retained Earnings	$2.457B		$1.847B
YoY Change	33.03%		19.19%
Common Stock	$18.80M		$18.80M
YoY Change	0.0%		0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$229.5M		$167.7M
YoY Change	36.85%		42.0%
Treasury Stock Shares	1.100M shares		1.300M shares
Shareholders Equity	$2.335B	$2.335B	$1.855B
YoY Change
Total Liabilities & Shareholders Equity	$3.314B	$3.314B	$2.794B
YoY Change	18.61%	18.61%	19.32%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	$147.7M	$661.8M	$98.40M
YoY Change	50.1%	91.16%	53.99%
Depreciation, Depletion And Amortization	$34.40M	$122.3M	$28.50M
YoY Change	20.7%	12.1%	8.37%
Cash From Operating Activities	$160.8M	$584.0M	$148.7M
YoY Change	8.14%	23.6%	39.76%
INVESTING ACTIVITIES
Capital Expenditures	-$76.50M	$253.4M	$53.90M
YoY Change	-241.93%	45.3%	43.35%
Acquisitions
YoY Change
Other Investing Activities	-$900.0K	-$2.500M	-$3.700M
YoY Change	-75.68%	-149.02%	-95.54%
Cash From Investing Activities	-$77.40M	-$253.1M	-$57.60M
YoY Change	34.38%	41.0%	-52.24%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$137.1M
YoY Change		18.7%
Debt Paid & Issued, Net		$0.00
YoY Change
Cash From Financing Activities	-6.200M	-$168.1M	-8.700M
YoY Change	-28.74%	22.61%	-117.06%
NET CHANGE
Cash From Operating Activities	160.8M	$584.0M	148.7M
Cash From Investing Activities	-77.40M	-$253.1M	-57.60M
Cash From Financing Activities	-6.200M	-$168.1M	-8.700M
Net Change In Cash	77.20M	$147.1M	82.40M
YoY Change	-6.31%	-16.61%	123.91%
FREE CASH FLOW
Cash From Operating Activities	$160.8M	$584.0M	$148.7M
Capital Expenditures	-$76.50M	$253.4M	$53.90M
Free Cash Flow	$237.3M	$330.6M	$94.80M
YoY Change	150.32%	10.9%	37.79%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000105770
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2019	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	http://fasb.org/us-gaap/2021-01-31#AccountingStandardsUpdate201613Member
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	1-8036
CY2021	dei	Entity Registrant Name EntityRegistrantName	WEST PHARMACEUTICAL SERVICES, INC.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	PA
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	23-1210010
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	530 Herman O. West Drive
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Exton
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	PA
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	19341-0645
CY2021	dei	City Area Code CityAreaCode	610
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Local Phone Number LocalPhoneNumber	594-2900
CY2021	dei	Security12b Title Security12bTitle	Common Stock, par value $.25 per share
CY2021	dei	Trading Symbol TradingSymbol	WST
CY2021	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	26500000000	USD
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	74281589	shares
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2831600000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2146900000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1839900000	USD
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1655800000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1379100000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1234200000	USD
CY2021	us-gaap	Gross Profit GrossProfit	1175800000	USD
CY2020	us-gaap	Gross Profit GrossProfit	767800000	USD
CY2019	us-gaap	Gross Profit GrossProfit	605700000	USD
CY2021	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	52800000	USD
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	46900000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	38900000	USD
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	362800000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	302000000.0	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	272700000	USD
CY2021	wst	Other Income Expense OtherIncomeExpense	-7900000	USD
CY2020	wst	Other Income Expense OtherIncomeExpense	-12000000.0	USD
CY2019	wst	Other Income Expense OtherIncomeExpense	2500000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	752300000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	406900000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	296600000	USD
CY2021	us-gaap	Interest Expense InterestExpense	8200000	USD
CY2020	us-gaap	Interest Expense InterestExpense	8200000	USD
CY2019	us-gaap	Interest Expense InterestExpense	8500000	USD
CY2021	us-gaap	Investment Income Net InvestmentIncomeNet	1000000.0	USD
CY2020	us-gaap	Investment Income Net InvestmentIncomeNet	1400000	USD
CY2019	us-gaap	Investment Income Net InvestmentIncomeNet	3800000	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3800000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1200000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-100000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	748900000	USD
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CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	291800000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	107200000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	72500000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	59000000.0	USD
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	20100000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	17400000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	8900000	USD
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CY2019	us-gaap	Net Income Loss NetIncomeLoss	241700000	USD
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CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74400000	shares
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CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76300000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	75800000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	75400000	shares
CY2021	us-gaap	Net Income Loss NetIncomeLoss	661800000	USD
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CY2019	us-gaap	Net Income Loss NetIncomeLoss	241700000	USD
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CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	500000	USD
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CY2019	wst	Other Comprehensive Income Loss Defined Benefit Plans Settlement Effects Arising During Period Tax OtherComprehensiveIncomeLossDefinedBenefitPlansSettlementEffectsArisingDuringPeriodTax	800000	USD
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CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	100000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	200000	USD
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CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	500000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-600000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-200000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	700000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-1100000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-400000	USD
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CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4600000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	612800000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	385200000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	246300000	USD
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	762600000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	615500000	USD
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CY2020Q4	us-gaap	Inventory Net InventoryNet	321300000	USD
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CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2035500000	USD
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CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1092300000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1057500000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	943200000	USD
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CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	68300000	USD
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CY2020Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	214700000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	109900000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	111100000	USD
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CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	30500000	USD
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	48500000	USD
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CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	23400000	USD
CY2021Q4	us-gaap	Assets Assets	3313800000	USD
CY2020Q4	us-gaap	Assets Assets	2793800000	USD
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CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	208800000	USD
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CY2021Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	28900000	USD
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CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	31800000	USD
CY2021Q4	us-gaap	Liabilities Liabilities	978400000	USD
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CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
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CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	75300000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	75300000	shares
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CY2020Q4	us-gaap	Common Stock Value CommonStockValue	18800000	USD
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CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	2335400000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1854500000	USD
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CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2793800000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1396300000	USD
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CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	54500000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	83100000	USD
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CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	60500000	USD
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	115500000	USD
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CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	51800000	USD
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CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1854500000	USD
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CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	137100000	USD
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CY2019	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Curtailments DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments	-3500000	USD
CY2021	us-gaap	Payment For Contingent Consideration Liability Operating Activities PaymentForContingentConsiderationLiabilityOperatingActivities	1400000	USD
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CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-1300000	USD
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CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-800000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-42900000	USD
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CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	73700000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	18600000	USD
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CY2020	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-5500000	USD
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CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	36600000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	25300000	USD
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CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	126400000	USD
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CY2019	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	85100000	USD
CY2019	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	90000000.0	USD
CY2020	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	18900000	USD
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CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	136300000	USD
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CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	45100000	USD
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CY2019	us-gaap	Proceeds From Other Equity ProceedsFromOtherEquity	5400000	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	137100000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	115500000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	83100000	USD
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	14800000	USD
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CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2200000	USD
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CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-137100000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-36800000	USD
CY2021	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-15700000	USD
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CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	176400000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	101700000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	615500000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	439100000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	337400000	USD
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	762600000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	615500000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	439100000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	8000000.0	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	8100000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	8600000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	171800000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	48400000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	47500000	USD
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	41100000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	31300000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	17000000.0	USD
CY2021Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	13400000	USD
CY2020Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	12600000	USD
CY2019Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	11800000	USD
CY2021	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	0	USD
CY2020	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	0	USD
CY2019	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	4900000	USD
CY2019Q2	us-gaap	Business Acquisition Cost Of Acquired Entity Transaction Costs BusinessAcquisitionCostOfAcquiredEntityTransactionCosts	18900000	USD
CY2019Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Inventory BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory	4500000	USD
CY2019Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	600000	USD
CY2019Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet	2600000	USD
CY2019Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill	11200000	USD
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates:</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> The financial statements are prepared in conformity with U.S. GAAP. These principles require management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingencies in the financial statements. Actual amounts realized may differ from these estimates.</span>
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	400000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1100000	USD
CY2021Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	153800000	USD
CY2020Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	133500000	USD
CY2021Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	63500000	USD
CY2020Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	54900000	USD
CY2021Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	161100000	USD
CY2020Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	132900000	USD
CY2021Q4	us-gaap	Inventory Net InventoryNet	378400000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	321300000	USD
CY2021	wst	Contract With Customer Liability Increase Decrease Due To Additional Cash Payments ContractWithCustomerLiabilityIncreaseDecreaseDueToAdditionalCashPayments	112300000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	0	USD
CY2021	wst	Contract With Customer Liability Revenue Recognized During The Period ContractWithCustomerLiabilityRevenueRecognizedDuringThePeriod	72000000	USD
CY2021	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	1
CY2020	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	1
CY2019	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	1
CY2021	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	1
CY2020	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	1
CY2019	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	1
CY2021	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	1
CY2020	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	1
CY2019	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	1
CY2020Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	10900000	USD
CY2021Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	14600000	USD
CY2021	wst	Contract With Customer Asset Increase Decrease ContractWithCustomerAssetIncreaseDecrease	3700000	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	57100000	USD
CY2021Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	61300000	USD
CY2021	us-gaap	Contract With Customer Liability Change In Timeframe Performance Obligation Satisfied Revenue Recognized ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized	4200000	USD
CY2021Q1	wst	Contract With Customer Liability Revenue Recognized During The Period ContractWithCustomerLiabilityRevenueRecognizedDuringThePeriod	31800000	USD
CY2018Q4	wst	Provision For Product Returns ProvisionForProductReturns	11300000	USD
CY2019	wst	Provision For Product Returns ProvisionForProductReturns	5400000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	661800000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	346200000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	241700000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74400000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	73900000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74000000.0	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1900000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1900000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1400000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76300000	shares
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	12700000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	12800000	USD
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	75800000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	75400000	shares
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	100000	shares
CY2020Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	631000	shares
CY2021Q4	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2021	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	479000	shares
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	137100000	USD
CY2021	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	286.23
CY2021Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	650000	shares
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	12900000	USD
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1300000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2215000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2035500000	USD
CY2021	us-gaap	Depreciation Depreciation	116900000	USD
CY2020	us-gaap	Depreciation Depreciation	104700000	USD
CY2019	us-gaap	Depreciation Depreciation	100000000	USD
CY2021	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	2000000	USD
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	1400000	USD
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	900000	USD
CY2021	wst	Lessee Operating Lease Option To Terminate Term LesseeOperatingLeaseOptionToTerminateTerm	P1Y
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	0	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	0	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	800000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	800000	USD
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	4800000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	3800000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	3300000	USD
CY2021	us-gaap	Lease Cost LeaseCost	18800000	USD
CY2020	us-gaap	Lease Cost LeaseCost	17400000	USD
CY2019	us-gaap	Lease Cost LeaseCost	17000000.0	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	12100000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	12600000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	12500000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	13300000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	6100000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	9100000	USD
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	201200000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y8M12D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P11Y1M6D
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0358
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0368
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	11500000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	10700000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	10000000.0	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	8200000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	7300000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	38700000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	86400000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	14100000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	72300000	USD
CY2019Q4	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	4900000	USD
CY2019Q4	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	82400000	USD
CY2019Q4	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	85100000	USD
CY2021Q4	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	115600000	USD
CY2020Q4	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	98200000	USD
CY2021	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	2700000	USD
CY2020	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	1600000	USD
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	2200000	USD
CY2021	wst	Purchases And Royalty Payments From Equity Method Investees PurchasesAndRoyaltyPaymentsFromEquityMethodInvestees	155000000	USD
CY2020	wst	Purchases And Royalty Payments From Equity Method Investees PurchasesAndRoyaltyPaymentsFromEquityMethodInvestees	143300000	USD
CY2019	wst	Purchases And Royalty Payments From Equity Method Investees PurchasesAndRoyaltyPaymentsFromEquityMethodInvestees	115100000	USD
CY2021Q4	us-gaap	Due To Affiliate Current And Noncurrent DueToAffiliateCurrentAndNoncurrent	25500000	USD
CY2020Q4	us-gaap	Due To Affiliate Current And Noncurrent DueToAffiliateCurrentAndNoncurrent	33600000	USD
CY2021	wst	Sales To Equity Method Investees SalesToEquityMethodInvestees	12000000	USD
CY2020	wst	Sales To Equity Method Investees SalesToEquityMethodInvestees	9700000	USD
CY2019	wst	Sales To Equity Method Investees SalesToEquityMethodInvestees	9200000	USD
CY2021Q4	us-gaap	Due From Affiliates DueFromAffiliates	2300000	USD
CY2020Q4	us-gaap	Due From Affiliates DueFromAffiliates	1400000	USD
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	201900000	USD
CY2021Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	6500000	USD
CY2020Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	12800000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	107800000	USD
CY2020	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	3300000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	111100000	USD
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	1700000	USD
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	100000	USD
CY2021	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-2800000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	109900000	USD
CY2021Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	100000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	81100000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	58100000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	23000000.0	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	83200000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	52700000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	30500000	USD
CY2021	us-gaap	Finite Lived Intangible Assets Foreign Currency Translation Gain Loss FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss	-1300000	USD
CY2020	us-gaap	Finite Lived Intangible Assets Foreign Currency Translation Gain Loss FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss	1300000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5400000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4400000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3400000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	4000000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	4000000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	4000000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	3000000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	2800000	USD
CY2021Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	48700000	USD
CY2020Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	51000000.0	USD
CY2021Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	13400000	USD
CY2020Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	12600000	USD
CY2021Q4	us-gaap	Accrued Sales Commission Current And Noncurrent AccruedSalesCommissionCurrentAndNoncurrent	38700000	USD
CY2020Q4	us-gaap	Accrued Sales Commission Current And Noncurrent AccruedSalesCommissionCurrentAndNoncurrent	10000000.0	USD
CY2021Q4	us-gaap	Other Postretirement Benefits Payable Current And Noncurrent OtherPostretirementBenefitsPayableCurrentAndNoncurrent	8800000	USD
CY2020Q4	us-gaap	Other Postretirement Benefits Payable Current And Noncurrent OtherPostretirementBenefitsPayableCurrentAndNoncurrent	8400000	USD
CY2021Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	13000000.0	USD
CY2020Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	15400000	USD
CY2021Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	3700000	USD
CY2020Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	3700000	USD
CY2021Q4	us-gaap	Interest Payable Current InterestPayableCurrent	3200000	USD
CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	3300000	USD
CY2021Q4	us-gaap	Restructuring Reserve RestructuringReserve	4600000	USD
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	7800000	USD
CY2021Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	3300000	USD
CY2020Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	9500000	USD
CY2021Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	26000000.0	USD
CY2020Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	21900000	USD
CY2021Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	163400000	USD
CY2020Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	143600000	USD
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	253000000.0	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	255200000	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	9400000	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	44200000	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	2300000	USD
CY2021Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	253500000	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	255700000	USD
CY2021Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	500000	USD
CY2020Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	500000	USD
CY2021Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	44200000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	2300000	USD
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	208800000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	252900000	USD
CY2012Q4	wst	Debt Instrument Number Of Tranches DebtInstrumentNumberOfTranches	3	tranche
CY2021	us-gaap	Interest Expense Debt InterestExpenseDebt	10200000	USD
CY2020	us-gaap	Interest Expense Debt InterestExpenseDebt	9600000	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	134000000	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	0	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	0	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	73000000	USD
CY2021	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	-3000000.0	USD
CY2020	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	-6100000	USD
CY2019	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	-6900000	USD
CY2021Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	15500000	USD
CY2021Q4	us-gaap	Foreign Currency Contract Asset Fair Value Disclosure ForeignCurrencyContractAssetFairValueDisclosure	14800000	USD
CY2021Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	36400000	USD
CY2021Q4	us-gaap	Business Combination Contingent Consideration Liability BusinessCombinationContingentConsiderationLiability	3700000	USD
CY2021Q4	us-gaap	Other Deferred Compensation Arrangements Liability Classified Noncurrent OtherDeferredCompensationArrangementsLiabilityClassifiedNoncurrent	16100000	USD
CY2021Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	23200000	USD
CY2020Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	12800000	USD
CY2020Q4	us-gaap	Foreign Currency Contract Asset Fair Value Disclosure ForeignCurrencyContractAssetFairValueDisclosure	3000000.0	USD
CY2020Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	16100000	USD
CY2020Q4	us-gaap	Business Combination Contingent Consideration Liability BusinessCombinationContingentConsiderationLiability	3600000	USD
CY2020Q4	us-gaap	Other Deferred Compensation Arrangements Liability Classified Noncurrent OtherDeferredCompensationArrangementsLiabilityClassifiedNoncurrent	14500000	USD
CY2020Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	33400000	USD
CY2019Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	3300000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	-1200000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	900000	USD
CY2020Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	3600000	USD
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CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	21400000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	1500000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	2000000.0	USD
CY2021Q4	wst	Deferred Tax Assets Royalty Acceleration DeferredTaxAssetsRoyaltyAcceleration	45100000	USD
CY2020Q4	wst	Deferred Tax Assets Royalty Acceleration DeferredTaxAssetsRoyaltyAcceleration	0	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	12200000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	35300000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	11000000.0	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	12200000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	15100000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	92200000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	54600000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	47200000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	42100000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	1800000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	6500000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	-400000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	400000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	48600000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	43600000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	5600000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	49000000.0	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.019
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.012
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.027
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	0.001
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	0.014
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	0.004
CY2021	wst	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings Net Of Foreign Tax Credits Percent EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarningsNetOfForeignTaxCreditsPercent	0.003
CY2020	wst	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings Net Of Foreign Tax Credits Percent EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarningsNetOfForeignTaxCreditsPercent	0.004
CY2019	wst	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings Net Of Foreign Tax Credits Percent EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarningsNetOfForeignTaxCreditsPercent	0.004
CY2021	wst	Effective Income Tax Rate Reconciliation Foreign Derived Intangible Income Deductions Fdii Percent EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomeDeductionsFDIIPercent	-0.015
CY2020	wst	Effective Income Tax Rate Reconciliation Foreign Derived Intangible Income Deductions Fdii Percent EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomeDeductionsFDIIPercent	-0.011
CY2019	wst	Effective Income Tax Rate Reconciliation Foreign Derived Intangible Income Deductions Fdii Percent EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomeDeductionsFDIIPercent	-0.006
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CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.012
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.014
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.004
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.007
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.010
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CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.003
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.002
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.004
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.143
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.181
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CY2021	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-1400000	USD
CY2021	us-gaap	Income Tax Reconciliation Deductions IncomeTaxReconciliationDeductions	18500000	USD
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-31500000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-500000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-20800000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-300000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-10300000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	10600000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	3400000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	800000	USD
CY2020	us-gaap	Revenues Revenues	2146900000	USD
CY2019	us-gaap	Revenues Revenues	1839900000	USD
CY2021Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	635300000	USD
CY2021Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	93600000	USD
CY2021Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	48300000	USD
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2021	us-gaap	Revenues Revenues	2831600000	USD
CY2021	us-gaap	Revenues Revenues	2831600000	USD
CY2020	us-gaap	Revenues Revenues	2146900000	USD
CY2019	us-gaap	Revenues Revenues	1839900000	USD
CY2021Q4	us-gaap	Noncurrent Assets NoncurrentAssets	1126800000	USD
CY2020Q4	us-gaap	Noncurrent Assets NoncurrentAssets	1011500000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	752300000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	406900000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	296600000	USD
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-3400000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-5600000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-4800000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	748900000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	401300000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	291800000	USD
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2021Q4	us-gaap	Assets Assets	3313800000	USD
CY2020Q4	us-gaap	Assets Assets	2793800000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	122300000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	109100000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	103400000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	253400000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	174400000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	126400000	USD
CY2021	dei	Auditor Name AuditorName	PricewaterhouseCoopers LLP
CY2021	dei	Auditor Location AuditorLocation	Philadelphia, Pennsylvania
CY2021	dei	Auditor Firm AuditorFirmId	238
CY2020Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	16200000	USD
CY2021	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	-3600000	USD
CY2021	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	0	USD
CY2021Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	12600000	USD
CY2019Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	16400000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	700000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	900000	USD
CY2020Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	16200000	USD
CY2018Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	18000000.0	USD
CY2019	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	100000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	1700000	USD
CY2019Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	16400000	USD

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$WST
WEST PHARMACEUTICAL SERVICES INC Stock $wst

2021 Q4 Form 10-K Financial Statement

#000162828022003342 Filed on February 22, 2022

Income Statement

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Facts In Submission

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$WST WEST PHARMACEUTICAL SERVICES INC Stock $wst

2021 Q4 Form 10-K Financial Statement

#000162828022003342 Filed on February 22, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WST
WEST PHARMACEUTICAL SERVICES INC Stock $wst