XML 21 R54.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Debt (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Debt Instrument [Line Items] |  |
Gains (Losses) on extinguishment of debt, less than | $ 0.1 wst_GainsLossesonextinguishmentofdebtlessthan |
Long-term debt | 336.7 us-gaap_LongTermDebt | 373.5 us-gaap_LongTermDebt
Current portion of long-term debt | 27.2 us-gaap_DebtCurrent | 2.2 us-gaap_DebtCurrent
Long-term debt, excluding current portion | 309.5 us-gaap_LongTermDebtNoncurrent | 371.3 us-gaap_LongTermDebtNoncurrent
Senior A Notes Due 2022 [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument, stated interest rate | 3.67%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = wst_SeniorNotesDue2022Member |
Senior B Notes Due 2024 [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument, stated interest rate | 3.82%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = wst_SeniorBNotesDue2024Member |
Senior C Notes Due 2027 [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument, stated interest rate | 4.02%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = wst_SeniorCNotesDue2027Member |
Term Loan Due 2014 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt |  | 0.1 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember
Debt instrument, stated interest rate | 8.40%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |
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
Debt instrument, stated interest rate | 1.13%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = wst_SeriesBFloatingRateNotesDue2015Member |
EURO Note B Due 2016 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 74.3 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_EuroNoteBDue2016Member | 84.1 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_EuroNoteBDue2016Member
Debt instrument, stated interest rate | 4.38%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = wst_EuroNoteBDue2016Member |
Capital leases Due through 2016 [Member] |  |
Debt Instrument [Line Items] |  |
Capital leases | 0.2 us-gaap_CapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember | 0.4 us-gaap_CapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember
Debt instrument, stated interest rate | 6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |
Revolving Credit Facility Due 2017 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 29.7 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_RevolvingCreditFacilityDue2017Member | 53.7 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_RevolvingCreditFacilityDue2017Member
Debt instrument, stated interest rate | 1.71%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = wst_RevolvingCreditFacilityDue2017Member |
Term Loan Due 2018 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 39.2 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_TermLoanDue2018Member | 41.3 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_TermLoanDue2018Member
Debt instrument, stated interest rate | 1.66%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = wst_TermLoanDue2018Member |
Note Payable Due 2019 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 0.3 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_NotePayableDue2019Member | 0.3 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = wst_NotePayableDue2019Member
Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 168.0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Senior A Notes Due 2022 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 42.0 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = wst_SeniorNotesDue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 42.0 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = wst_SeniorNotesDue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt instrument, stated interest rate | 3.67%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = wst_SeniorNotesDue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Senior B Notes Due 2024 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 53.0 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = wst_SeniorBNotesDue2024Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 53.0 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = wst_SeniorBNotesDue2024Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt instrument, stated interest rate | 3.82%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = wst_SeniorBNotesDue2024Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Senior C Notes Due 2027 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 73.0 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = wst_SeniorCNotesDue2027Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 73.0 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = wst_SeniorCNotesDue2027Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt instrument, stated interest rate | 4.02%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = wst_SeniorCNotesDue2027Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Convertible Debt Due 2047 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt |  | $ 0.6 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember
Debt instrument, stated interest rate | 4.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |

X
- 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
Name: | us-gaap_CapitalLeaseObligations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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
Name: | us-gaap_DebtCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_LongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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
Name: | us-gaap_LongTermDebtNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Gains (Losses) on extinguishment of debt, less than + References No definition available. + Details
Name: | wst_GainsLossesonextinguishmentofdebtlessthan
Namespace Prefix: | wst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=wst_SeniorBNotesDue2024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=wst_SeniorCNotesDue2027Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=wst_SeniorNotesDue2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_CapitalLeaseObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_LoansPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=wst_EuroNoteBDue2016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=wst_NotePayableDue2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=wst_RevolvingCreditFacilityDue2017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=wst_SeriesBFloatingRateNotesDue2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=wst_TermLoanDue2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |