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v2.4.1.9

Debt (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014
Debt Instrument [Line Items] |  |
Long-term debt | $ 330.7 us-gaap_LongTermDebt | $ 336.7 us-gaap_LongTermDebt
Less: current portion of long-term debt | 98.8 us-gaap_DebtCurrent | 27.2 us-gaap_DebtCurrent
Long-term debt, excluding current portion | 231.9 us-gaap_LongTermDebtNoncurrent | 309.5 us-gaap_LongTermDebtNoncurrent
Series B Floating Rate Notes Due 2015 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 25.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_SeriesBFloatingRateNotesDue2015Member | 25.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_SeriesBFloatingRateNotesDue2015Member
Euro Note B Due 2016 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 66.3 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_EuroNoteBDue2016Member | 74.3 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_EuroNoteBDue2016Member
Capital leases, due 2016 [Member] |  |
Debt Instrument [Line Items] |  |
Capital leases | 0.1 us-gaap_CapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember | 0.2 us-gaap_CapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember
Revolving credit facility, due 2017 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 32.3 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_RevolvingCreditFacilityDue2017Member | 29.7 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_RevolvingCreditFacilityDue2017Member
Line of credit facility outstanding borrowings, Yen | 4.2 wst_LineOfCreditFacilityOutstandingBorrowingsYen / us-gaap_LongtermDebtTypeAxis = wst_RevolvingCreditFacilityDue2017Member |
Line of credit facility outstanding borrowings, Euro | 22.8 wst_LineOfCreditFacilityOutstandingBorrowingsEuro / us-gaap_LongtermDebtTypeAxis = wst_RevolvingCreditFacilityDue2017Member |
Line of credit, current | 5.3 us-gaap_LinesOfCreditCurrent / us-gaap_LongtermDebtTypeAxis = wst_RevolvingCreditFacilityDue2017Member |
Term Loan Due 2018 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 38.7 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_TermLoanDue2018Member | 39.2 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_TermLoanDue2018Member
Current portion of long-term debt | 2.1 us-gaap_LongTermDebtCurrent / us-gaap_LongtermDebtTypeAxis = wst_TermLoanDue2018Member |
Debt Instrument Term | 5 years 0 months 0 days |
Notes Payable due 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 0.3 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember | 0.3 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember
Series A Notes, Due 2022 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 42.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_SeniorNotesDue2022Member | 42.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_SeniorNotesDue2022Member
Series B Notes, Due 2024 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 53.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_SeniorBNotesDue2024Member | 53.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_SeniorBNotesDue2024Member
Series C Notes, Due 2027 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 73.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_SeniorCNotesDue2027Member | $ 73.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_SeniorCNotesDue2027Member

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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X
- Definition Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer. + 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 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Article 5 + Details
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- Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Balance Type: | na
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X
- Definition The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + 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 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Line-of-Credit Arrangement -URI http://asc.fasb.org/extlink&oid=6517033 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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X
- Definition Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + 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 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Article 5 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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- Definition Line of credit facility outstanding borrowings, Euro + References No definition available. + Details
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Namespace Prefix: | wst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line of credit facility outstanding borrowings, Yen + References No definition available. + Details
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Namespace Prefix: | wst_
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Balance Type: | credit
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- Details
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- Details
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Balance Type: |
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- Details
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Balance Type: |
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- Details
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