2.2.0.25falsefalse20800 - Disclosure - Debt (Policies)truefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $FROM_Jan01_2010_TO_Dec31_2010http://www.sec.gov/CIK0001000697duration2010-01-01T00:00:002010-12-31T00:00:00SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170EPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2true0wat_DebtPoliciesAbstractwatfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseDebt (Policies) [Abstract]3false0us-gaap_DebtPolicyTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:0px;">The outstanding portions of the revolving facilities have been classified as short-term liabilities in the consolidated balance sheets due to the fact that the Company utilizes the revolving line of credit to fund its working capital needs. It is the Company's intention to pay the outstanding revolving line of credit balance during the subsequent twelve months following the respective period end date.</font></p>The outstanding portions of the revolving facilities have been classified as short-term liabilities in the consolidated balance sheets due to the fact that thefalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescribes the entity's accounting policies with respect to costs incurred to obtain or issue debt, the effects of refinancings, method of amortizing deferred financing costs and original issue discount, and classifications of debt on the balance sheet.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 22 -Paragraph 8, 12 falsefalseDebt Policy12Debt (Policies)UnKnownUnKnownUnKnownUnKnownfalsetrue