1.0.0.3 false Comprehensive Income false 1 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDPerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 2 NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS 0 wlt_NotesToConsolidatedFinancialsAbstract wlt false na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false No definition available. false 3 Comprehensive Income 1 us-gaap_ComprehensiveIncomeNoteTextBlock us-gaap true na duration string No definition available. false false false false false false false false false 1 false false 0 0 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=utf-8"> <META content="MSHTML 6.00.6000.16850" name=GENERATOR></HEAD> <BODY> Note 6Comprehensive Income         Comprehensive income is comprised primarily of net income, gains or losses from the effect of cash flow hedges and changes in pension and postretirement benefits obligations. Comprehensive income for the three months ended June 30, 2009 and 2008 was $12.8 million and $46.5 million, respectively. Comprehensive income for the six months ended June 30, 2009 and 2008 was $86.5 million and $48.2 million, respectively. </BODY></HTML> Note 6Comprehensive Income         Comprehensive income is comprised primarily of net income, gains or false false No definition available. No authoritative reference available. false false 1 2 false UnKnown UnKnown UnKnown false true