XML 33 R35.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Financial Instruments and Derivative Instruments (Details 3) | 3 Months Ended
--- | ---
Mar. 30, 2014
Derivative instruments |
Percentage of projected intercompany purchases hedged by forward exchange contracts | 50.00%
Period of projected intercompany purchase transactions | 12 months

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

X
- Definition Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions. + References No definition available. + Details
Name: | wts_MaximumLengthOfTimeHedgedInForeignCurrencyContract
Namespace Prefix: | wts_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of projected intercompany purchase transactions hedged for the next twelve months by forward exchange contracts. + References No definition available. + Details
Name: | wts_PercentageOfProjectedIntercompanyPurchaseTransactionsHedgedForNextTwelveMonthsByForwardExchangeContracts
Namespace Prefix: | wts_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration