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v2.4.1.9

Segment Information (Segment Financial Information) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |
Operating profit | $ 182.0 us-gaap_OperatingIncomeLoss | $ 162.4 us-gaap_OperatingIncomeLoss | $ 135.1 us-gaap_OperatingIncomeLoss
Loss on debt extinguishment | 0 us-gaap_GainsLossesOnExtinguishmentOfDebt | (0.2)us-gaap_GainsLossesOnExtinguishmentOfDebt | (11.6)us-gaap_GainsLossesOnExtinguishmentOfDebt
Interest expense, net | (13.0)us-gaap_InterestIncomeExpenseNonoperatingNet | (15.1)us-gaap_InterestIncomeExpenseNonoperatingNet | (14.9)us-gaap_InterestIncomeExpenseNonoperatingNet
Income before income taxes | 169.0 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 147.1 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 108.6 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Segment assets | 1,670.9 us-gaap_Assets | 1,671.6 us-gaap_Assets | 1,564.0 us-gaap_Assets
Capital expenditures | 111.9 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | 151.9 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | 131.3 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Depreciation and amortization expense | 90.0 us-gaap_DepreciationDepletionAndAmortization | 85.2 us-gaap_DepreciationDepletionAndAmortization | 76.9 us-gaap_DepreciationDepletionAndAmortization
Packaging Systems [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating profit | 223.0 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember | 217.0 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember | 187.5 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember
Loss on debt extinguishment |  | 0 us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember | 0 us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember
Interest expense, net | 0 us-gaap_InterestIncomeExpenseNonoperatingNet / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember | 0 us-gaap_InterestIncomeExpenseNonoperatingNet / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember | 0 us-gaap_InterestIncomeExpenseNonoperatingNet / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember
Income before income taxes | 223.0 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember | 217.0 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember | 187.5 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember
Segment assets | 1,024.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember | 1,048.9 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember | 942.7 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember
Capital expenditures | 76.5 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember | 81.3 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember | 74.3 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember
Depreciation and amortization expense | 58.3 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember | 55.5 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember | 52.7 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = wst_PackagingSystemsMember
Delivery Systems [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating profit | 13.5 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember | 9.4 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember | 18.4 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember
Loss on debt extinguishment |  | 0 us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember | 0 us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember
Interest expense, net | 0 us-gaap_InterestIncomeExpenseNonoperatingNet / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember | 0 us-gaap_InterestIncomeExpenseNonoperatingNet / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember | 0 us-gaap_InterestIncomeExpenseNonoperatingNet / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember
Income before income taxes | 13.5 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember | 9.4 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember | 18.4 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember
Segment assets | 405.1 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember | 429.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember | 389.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember
Capital expenditures | 35.8 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember | 28.5 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember | 24.5 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember
Depreciation and amortization expense | 23.0 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember | 20.9 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember | 18.4 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = wst_DeliverySystemsMember
Corporate and Eliminations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating profit | (54.5)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember | (64.0)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember | (70.8)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember
Loss on debt extinguishment |  | (0.2)us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember | (11.6)us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember
Interest expense, net | (13.0)us-gaap_InterestIncomeExpenseNonoperatingNet / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember | (15.1)us-gaap_InterestIncomeExpenseNonoperatingNet / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember | (14.9)us-gaap_InterestIncomeExpenseNonoperatingNet / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember
Income before income taxes | (67.5)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember | (79.3)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember | (97.3)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember
Segment assets | 241.5 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember | 193.4 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember | 232.0 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember
Capital expenditures | (0.4)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember | 42.1 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember | 32.5 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember
Depreciation and amortization expense | $ 8.7 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember | $ 8.8 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember | $ 5.8 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = wst_CorporateAndEliminationsMember

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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- Definition Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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