2.2.0.25falsefalse0603 - Disclosure - Share-Based Compensation (Details)truefalseIn Millionsfalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $Jan-01-2010_Dec-31-2010http://www.sec.gov/CIK0000884629duration2010-01-01T00:00:002010-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2falsefalseUSDfalsefalse1/1/2009 - 12/31/2009 USD ($) USD ($) / shares $TwelveMonthsEnded_31Dec2009http://www.sec.gov/CIK0000884629duration2009-01-01T00:00:002009-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$3falsefalseUSDfalsefalse1/1/2008 - 12/31/2008 USD ($) USD ($) / shares $TwelveMonthsEnded_31Dec2008http://www.sec.gov/CIK0000884629duration2008-01-01T00:00:002008-12-31T00:00:00SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$3true0wpi_ShareBasedCompensationDetailsTextualsAbstractwpifalsenadurationShare Based Compensation.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShare Based Compensation.falsefalseShare Based Compensation (Details) (Textuals) [Abstract]4false0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse52000005.2falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseSharesxbrli:sharesItemTypesharesThe maximum number of shares originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the share-based compensation plan. As stock options and equity instruments other than options are awarded to participants, the shares remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph a falsefalseCommon shares reserved for issuance of share-based compensation awards5false0wpi_OptionAwardPlanExercisableOverPeriodwpifalsenadurationOption award plan exercisable over period.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00three to five yearsthree to five yearsfalsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringOption award plan exercisable over period.No authoritative reference available.falsefalseOption award plan exercisable over period6false0wpi_OptionAwardPlanExpireswpifalsenadurationOption award plan expires.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse0010 years10 yearsfalsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringOption award plan expires.No authoritative reference available.falsefalseOption award plan expires7false0wpi_DurationOverWhichRestrictionsEliminatedFromRestrictedStockAwardswpifalsenadurationDuration over which restrictions eliminated from restricted stock awards.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00over a one to four year periodover a one to four year periodfalsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDuration over which restrictions eliminated from restricted stock awards.No authoritative reference available.falsefalseDuration over which restrictions eliminated from restricted stock awards8false0wpi_LapseOfRestrictionsForNonemployeeDirectorswpifalsenadurationLapse of restrictions for non-employee directors.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00after one yearafter one yearfalsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLapse of restrictions for non-employee directors.No authoritative reference available.falsefalseLapse of restrictions for non-employee directors9false0wpi_LapseOfRestrictionsForEmployeeswpifalsenadurationLapse Of Restrictions For Employeesfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00two to four year periodtwo to four year periodfalsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLapse Of Restrictions For EmployeesNo authoritative reference available.falsefalseLapse of restrictions for employees10false0us-gaap_ShareBasedCompensationus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse2350000023.5falsetruefalsefalsefalse2truefalsefalse1910000019.1falsetruefalsefalsefalse3truefalsefalse1850000018.5falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock options, amortization of restricted stock, and adjustment for officers compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseRecognized share-based compensation expense11false0wpi_ShareBasedCompensationCapitalizedToInventorywpifalsedebitdurationShare-based compensation capitalized to inventory.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse36000003.6falsetruefalsefalsefalse2truefalsefalse27000002.7falsetruefalsefalsefalse3truefalsefalse33000003.3falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryShare-based compensation capitalized to inventory.No authoritative reference available.falsefalseShare-based compensation capitalized to inventory39Share-Based Compensation (Details) (USD $)HundredThousandsHundredThousandsUnKnownUnKnownfalsetrue