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Consolidated Statements of Comprehensive (Loss) Income (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Consolidated Statements of Comprehensive (Loss) Income |  |  |
Net income | $ 50.3 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 58.6 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 68.4 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Other comprehensive income (Loss): |  |  |
Foreign currency translation adjustments | (90.8)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent | 23.5 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent | 14.3 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent
Defined benefit pension plans, net of tax: |  |  |
Net loss, net of tax benefits of $6.9, $0.8, and $4.1 in 2014, 2013 and 2012, respectively | (11.0)wts_OtherComprehensiveIncomeDefinedBenefitPlanNetIncomeLossForThePeriodNetOfTax | (1.3)wts_OtherComprehensiveIncomeDefinedBenefitPlanNetIncomeLossForThePeriodNetOfTax | (6.5)wts_OtherComprehensiveIncomeDefinedBenefitPlanNetIncomeLossForThePeriodNetOfTax
Amortization of net losses included in net periodic pension cost, net of tax expense of $0.5, $0.4, and $0.2 in 2014, 2013 and 2012, respectively | 0.7 wts_OtherComprehensiveIncomeAmortizationOfNetLossesIncludedInNetPeriodicPensionCost | 0.6 wts_OtherComprehensiveIncomeAmortizationOfNetLossesIncludedInNetPeriodicPensionCost | 0.4 wts_OtherComprehensiveIncomeAmortizationOfNetLossesIncludedInNetPeriodicPensionCost
Defined benefit pension plans, net of tax | (10.3)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent | (0.7)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent | (6.1)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent
Other comprehensive (loss) income | (101.1)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | 22.8 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | 8.2 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Comprehensive (Loss) income | $ (50.8)us-gaap_ComprehensiveIncomeNetOfTax | $ 81.4 us-gaap_ComprehensiveIncomeNetOfTax | $ 76.6 us-gaap_ComprehensiveIncomeNetOfTax

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Comprehensive Income -URI http://asc.fasb.org/extlink&oid=35737396 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e557-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 + Details
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- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569643-111683 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 + Details
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