2.0.0.10 false Income Taxes 0208 - Disclosure - Income Taxes true false false false 1 usd $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 2 Income Taxes [Abstract] 0 us-gaap_IncomeTaxExpenseBenefitAbstract us-gaap true na duration string No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false No definition available. false 3 Income Taxes 1 wft_IncomeTaxTextBlock wft false na duration normalizedstring Disclosure related to the Company's effective tax rates, which includes an explanation of the variances in the effective tax... false false false false false false false false false false false verboselabel false 1 false false false false 0 0 <!--DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" --> <!-- Begin Block Tagged Note 8 - wft:IncomeTaxTextBlock--> <div style="font-family: 'Times New Roman',Times,serif"> <div align="left" style="font-size: 10pt; margin-top: 12pt"><b>8. Income Taxes</b> </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">&#160;&#160;&#160;&#160;&#160;Our effective tax rate was a benefit of 30.2% and a provision of 15.7% for the three months ended March&#160;31, 2010 and 2009, respectively. The change in the effective tax rate is primarily due to the tax benefit related to the devaluation of the Venezuelan Bolivar, which was partially offset by curtailment expense on our supplemental executive retirement plan (&#8220;SERP&#8221;) that had no related tax benefit and changes in our geographic earnings mix. </div> <!-- Folio --> <!-- /Folio --> </div> <!-- PAGEBREAK --> <div style="font-family: 'Times New Roman',Times,serif"> <div align="center" style="font-size: 10pt; margin-top: 0pt"> <b> </b> </div> </div> <!--DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" --> <!-- Begin Block Tagged Note false false false Disclosure related to the Company's effective tax rates, which includes an explanation of the variances in the effective tax rates over the applicable periods. No authoritative reference available. false false 1 2 false UnKnown UnKnown UnKnown false true