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v2.4.1.9

Segment Information (Sales and PPE by Geographic Location) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Sales | $ 1,421.4 us-gaap_SalesRevenueNet | $ 1,368.4 us-gaap_SalesRevenueNet | $ 1,266.4 us-gaap_SalesRevenueNet
Property, Plant and Equipment, Net | 705.8 us-gaap_PropertyPlantAndEquipmentNet | 711.7 us-gaap_PropertyPlantAndEquipmentNet | 669.0 us-gaap_PropertyPlantAndEquipmentNet
United States [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Sales | 655.5 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 614.5 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 592.8 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US
Property, Plant and Equipment, Net | 339.4 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_US | 336.0 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_US | 322.0 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_US
Germany [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Sales | 219.4 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_DE | 219.6 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_DE | 184.4 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_DE
Property, Plant and Equipment, Net | 110.9 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_DE | 124.4 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_DE | 117.2 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_DE
France [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Sales | 118.2 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_FR | 112.6 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_FR | 102.6 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_FR
Property, Plant and Equipment, Net | 40.4 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_FR | 43.4 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_FR | 42.1 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_FR
Other European Countries [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Sales | 285.0 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = wst_OtherEuropeCountriesMember | 279.4 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = wst_OtherEuropeCountriesMember | 251.4 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = wst_OtherEuropeCountriesMember
Property, Plant and Equipment, Net | 91.5 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = wst_OtherEuropeCountriesMember | 83.2 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = wst_OtherEuropeCountriesMember | 72.3 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = wst_OtherEuropeCountriesMember
Other [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Sales | 143.3 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = wst_OtherCountriesMember | 142.3 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = wst_OtherCountriesMember | 135.2 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = wst_OtherCountriesMember
Property, Plant and Equipment, Net | $ 123.6 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = wst_OtherCountriesMember | $ 124.7 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = wst_OtherCountriesMember | $ 115.4 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = wst_OtherCountriesMember

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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -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 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 + Details
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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