2.4.0.8300100 - Disclosure - MARKETABLE SECURITIES (Tables)truefalsefalse1false
falsefalseFROM_Jan01_2013_TO_Jun30_2013http://www.sec.gov/CIK0000072741duration2013-01-01T00:00:002013-06-30T00:00:001true
1nu_NotesToConsolidatedFinancialStatementsAbstractnu_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse| 1falsefalsefalse00falsefalsefalse | xbrli:stringItemTypestringfalse0
2false
2us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse| 1falsefalsefalse00<div><table style="border-collapse:collapse;margin-top:20px;"><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"> </td><td colspan="11" style="width: 430px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:430px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">As of June 30, 2013</font></td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Pre-Tax</font><sup></sup></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Pre-Tax </font><sup></sup></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"> </td><td colspan="2" style="width: 100px; text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Amortized</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Unrealized</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Unrealized</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 11px"><td colspan="2" style="width: 124px; text-align:left;border-color:#000000;min-width:124px;"><font style="FONT-STYLE: italic;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: left;">(Millions of Dollars)</font></td><td colspan="2" style="width: 100px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Cost</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Gains</font><sup>(1)</sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Losses</font><sup>(1)</sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Fair Value</font></td></tr><tr style="height: 11px"><td colspan="2" style="width: 124px; text-align:left;border-color:#000000;min-width:124px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">NU</font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Debt Securities</font><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;"><sup> (2)</sup></font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 333.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 6.5</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> (0.7)</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 339.2</font></td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Equity Securities</font><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;"><sup> (2)</sup></font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 163.7</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 42.2</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> - </font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 205.9</font></td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 11px"><td colspan="2" style="width: 124px; text-align:left;border-color:#000000;min-width:124px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">WMECO </font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Debt Securities</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 57.8</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> - </font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> (0.1)</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 57.7</font></td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"> </td><td colspan="11" style="width: 430px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:430px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">As of December 31, 2012</font></td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Pre-Tax</font><sup></sup></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Pre-Tax </font><sup></sup></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"> </td><td colspan="2" style="width: 100px; text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Amortized</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Unrealized</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Unrealized</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 11px"><td colspan="2" style="width: 124px; text-align:left;border-color:#000000;min-width:124px;"><font style="FONT-STYLE: italic;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: left;">(Millions of Dollars)</font></td><td colspan="2" style="width: 100px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Cost</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Gains</font><sup>(1)</sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Losses</font><sup>(1)</sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Fair Value</font></td></tr><tr style="height: 11px"><td colspan="2" style="width: 124px; text-align:left;border-color:#000000;min-width:124px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">NU</font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Debt Securities</font><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;"><sup> (2)</sup></font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 266.6</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 13.3</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> (0.1)</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 279.8</font></td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Equity Securities</font><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;"><sup> (2)</sup></font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 145.5</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 20.0</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> - </font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 165.5</font></td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 11px"><td colspan="2" style="width: 124px; text-align:left;border-color:#000000;min-width:124px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">WMECO </font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 11px"><td style="width: 9px; text-align:left;border-color:#000000;min-width:9px;"> </td><td style="width: 115px; text-align:left;border-color:#000000;min-width:115px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Debt Securities</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 57.7</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 0.1</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> (0.1)</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 57.7</font></td></tr></table></div>falsefalsefalse | nonnum:textBlockItemTypenaTabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.No definition available.false0
3false
2us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse| 1falsefalsefalse00<div><table style="border-collapse:collapse;margin-top:20px;"><tr style="height: 10px"><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 153px; text-align:left;border-color:#000000;min-width:153px;"> </td><td colspan="5" style="width: 210px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:210px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">NU</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="5" style="width: 210px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:210px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">WMECO</font></td></tr><tr style="height: 10px"><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 153px; text-align:left;border-color:#000000;min-width:153px;"> </td><td colspan="2" style="width: 100px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Amortized</font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:100px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Amortized</font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:100px;"> </td></tr><tr style="height: 10px"><td colspan="2" style="width: 163px; text-align:left;border-color:#000000;min-width:163px;"><font style="FONT-STYLE: italic;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: left;">(Millions of Dollars)</font></td><td colspan="2" style="width: 100px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Cost</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Fair Value</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Cost</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Fair Value</font></td></tr><tr style="height: 10px"><td colspan="2" style="width: 163px; text-align:left;border-color:#000000;min-width:163px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Less than one year</font><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;"><sup> (1)</sup></font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 102.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 102.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 25.1</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 25.1</font></td></tr><tr style="height: 10px"><td colspan="2" style="width: 163px; text-align:left;border-color:#000000;min-width:163px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">One to five years</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 73.7</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 74.5</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 23.7</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 23.6</font></td></tr><tr style="height: 10px"><td colspan="2" style="width: 163px; text-align:left;border-color:#000000;min-width:163px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Six to ten years</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 57.9</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 59.0</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 3.6</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 3.6</font></td></tr><tr style="height: 10px"><td colspan="2" style="width: 163px; text-align:left;border-color:#000000;min-width:163px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Greater than ten years</font></td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 99.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 103.3</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 5.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 5.4</font></td></tr><tr style="height: 10px"><td colspan="2" style="width: 163px; text-align:left;border-color:#000000;min-width:163px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Total Debt Securities</font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 333.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 339.2</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 57.8</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 57.7</font></td></tr></table></div>falsefalsefalse | nonnum:textBlockItemTypenaTabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.No definition available.false0
4false
2nu_FairValueHeirarchyTableTextBlocknu_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse| 1falsefalsefalse00<div><table style="border-collapse:collapse;margin-top:20px;"><tr style="height: 9px"><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 190px; text-align:left;border-color:#000000;min-width:190px;"> </td><td colspan="5" style="width: 210px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:210px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">NU</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="5" style="width: 210px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:210px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">WMECO</font></td></tr><tr style="height: 9px"><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 190px; text-align:left;border-color:#000000;min-width:190px;"> </td><td colspan="5" style="width: 210px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:210px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">As of</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="5" style="width: 210px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:210px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">As of</font></td></tr><tr style="height: 9px"><td colspan="4" style="width: 220px; text-align:left;border-color:#000000;min-width:220px;"><font style="FONT-STYLE: italic;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: left;">(Millions of Dollars)</font></td><td colspan="2" style="width: 100px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">June 30, 2013</font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">December 31, 2012</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">June 30, 2013</font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 100px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:100px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">December 31, 2012</font></td></tr><tr style="height: 9px"><td colspan="4" style="width: 220px; text-align:left;border-color:#000000;min-width:220px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Level 1: </font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 9px"><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="3" style="width: 210px; text-align:left;border-color:#000000;min-width:210px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Mutual Funds and Equities</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 257.2</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 212.5</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> - </font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> - </font></td></tr><tr style="height: 9px"><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="3" style="width: 210px; text-align:left;border-color:#000000;min-width:210px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Money Market Funds</font></td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 77.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 40.2</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 4.8</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 5.2</font></td></tr><tr style="height: 9px"><td colspan="4" style="width: 220px; text-align:left;border-color:#000000;min-width:220px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Total Level 1</font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 334.6</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 252.7</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 4.8</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 5.2</font></td></tr><tr style="height: 9px"><td colspan="4" style="width: 220px; text-align:left;border-color:#000000;min-width:220px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Level 2:</font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 9px"><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="3" style="width: 210px; text-align:left;border-color:#000000;min-width:210px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">U.S. Government Issued Debt Securities </font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:left;border-color:#000000;min-width:90px;"> </td></tr><tr style="height: 9px"><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="2" style="width: 200px; text-align:left;border-color:#000000;min-width:200px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">(Agency and Treasury)</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 81.6</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 69.9</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 16.6</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 18.7</font></td></tr><tr style="height: 9px"><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="3" style="width: 210px; text-align:left;border-color:#000000;min-width:210px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Corporate Debt Securities</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 46.5</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 33.0</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 12.6</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 7.0</font></td></tr><tr style="height: 9px"><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="3" style="width: 210px; text-align:left;border-color:#000000;min-width:210px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Asset-Backed Debt Securities</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 29.9</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 28.5</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 10.5</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 10.9</font></td></tr><tr style="height: 9px"><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="3" style="width: 210px; text-align:left;border-color:#000000;min-width:210px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Municipal Bonds</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 89.1</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 93.8</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 9.7</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 11.6</font></td></tr><tr style="height: 9px"><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td colspan="3" style="width: 210px; text-align:left;border-color:#000000;min-width:210px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Other Fixed Income Securities</font></td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 14.7</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 14.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 3.5</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 90px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 4.3</font></td></tr><tr style="height: 9px"><td colspan="4" style="width: 220px; text-align:left;border-color:#000000;min-width:220px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Total Level 2</font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 261.8</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 239.6</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 52.9</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 52.5</font></td></tr><tr style="height: 9px"><td colspan="4" style="width: 220px; text-align:left;border-color:#000000;min-width:220px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">Total Marketable Securities</font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 596.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 492.3</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 57.7</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 10px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 90px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:90px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;"> 57.7</font></td></tr></table></div>falsefalsefalse | nonnum:textBlockItemTypenaNo authoritative reference available.No definition available.false0
falseMARKETABLE SECURITIES (Tables)UnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.nu.com/role/DisclosureMARKETABLESECURITIESTables14