2.4.0.8300165 - Disclosure - Long-Term Contractual Arrangements (Tables)truefalsefalse1false falsefalseFROM_Jan01_2013_TO_Jun30_2013http://www.sec.gov/CIK0000072741duration2013-01-01T00:00:002013-06-30T00:00:001true 1nu_NotesToConsolidatedFinancialStatementsAbstractnu_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Notes To Consolidated Financial Statements [Abstract]2false 2us-gaap_LongTermPurchaseCommitmentTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><table style="border-collapse:collapse;margin-top:20px;"><tr style="height: 22px"><td style="width: 184px; text-align:left;border-color:#000000;min-width:184px;">&#160;</td><td colspan="2" style="width: 59px; text-align:center;border-color:#000000;min-width:59px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">July - December</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:left;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 51px; text-align:left;border-color:#000000;min-width:51px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:left;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:left;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:left;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; text-align:left;border-color:#000000;min-width:49px;">&#160;</td></tr><tr style="height: 13px"><td style="width: 184px; text-align:left;border-color:#000000;min-width:184px;"><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: 59px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:59px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">2013</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td colspan="2" style="width: 60px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:60px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">2014</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td colspan="2" style="width: 61px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:61px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">2015</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td colspan="2" style="width: 60px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:60px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">2016</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td colspan="2" style="width: 60px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:60px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">2017</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td colspan="2" style="width: 60px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:60px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Thereafter</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td colspan="2" style="width: 59px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:59px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;TEXT-ALIGN: center;">Total</font></td></tr><tr style="height: 10px"><td style="width: 184px; text-align:left;border-color:#000000;min-width:184px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;">Yankee Billings</font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:49px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 51px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:51px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:49px;">&#160;</td></tr><tr style="height: 10px"><td style="width: 184px; text-align:left;border-color:#000000;min-width:184px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">CL&amp;P</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;">$</font></td><td style="width: 49px; text-align:right;border-color:#000000;min-width:49px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">1.0</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">1.5</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 51px; text-align:right;border-color:#000000;min-width:51px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">1.3</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">0.8</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">0.8</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">$</font></td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">13.1</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</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: 49px; text-align:right;border-color:#000000;min-width:49px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">18.5</font></td></tr><tr style="height: 10px"><td style="width: 184px; text-align:left;border-color:#000000;min-width:184px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">NSTAR Electric</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; text-align:right;border-color:#000000;min-width:49px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">0.5</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">0.7</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 51px; text-align:right;border-color:#000000;min-width:51px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">0.5</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">0.2</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">0.3</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">4.5</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; text-align:right;border-color:#000000;min-width:49px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">6.7</font></td></tr><tr style="height: 10px"><td style="width: 184px; text-align:left;border-color:#000000;min-width:184px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">PSNH</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; text-align:right;border-color:#000000;min-width:49px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">0.3</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">0.3</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 51px; text-align:right;border-color:#000000;min-width:51px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">0.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">0.3</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">0.3</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">5.2</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; text-align:right;border-color:#000000;min-width:49px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">6.8</font></td></tr><tr style="height: 10px"><td style="width: 184px; text-align:left;border-color:#000000;min-width:184px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">WMECO</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; text-align:right;border-color:#000000;min-width:49px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">0.3</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">0.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 51px; text-align:right;border-color:#000000;min-width:51px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">0.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">0.2</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">0.2</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">3.3</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; text-align:right;border-color:#000000;min-width:49px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">4.8</font></td></tr><tr style="height: 10px"><td style="width: 184px; text-align:left;border-color:#000000;min-width:184px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; text-align:right;border-color:#000000;min-width:49px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 51px; text-align:right;border-color:#000000;min-width:51px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:left;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; text-align:right;border-color:#000000;min-width:49px;">&#160;</td></tr><tr style="height: 10px"><td style="width: 184px; text-align:left;border-color:#000000;min-width:184px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7pt;COLOR: #000000;">Renewable Energy</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; text-align:right;border-color:#000000;min-width:49px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 51px; text-align:right;border-color:#000000;min-width:51px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:left;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; text-align:right;border-color:#000000;min-width:49px;">&#160;</td></tr><tr style="height: 10px"><td style="width: 184px; text-align:left;border-color:#000000;min-width:184px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: left;">CL&amp;P</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; text-align:right;border-color:#000000;min-width:49px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">4.6</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">49.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 51px; text-align:right;border-color:#000000;min-width:51px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">49.9</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">50.4</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;">51.0</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 50px; text-align:right;border-color:#000000;min-width:50px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">607.0</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 49px; text-align:right;border-color:#000000;min-width:49px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 8pt;COLOR: #000000;TEXT-ALIGN: right;">812.3</font></td></tr></table></div>falsefalsefalsenonnum:textBlockItemTypenaTabular disclosure of key provisions of an arrangement under which the entity has agreed to purchase goods or services over a period of time greater than one year or the normal operating cycle, if longer, including the item for which expenditures will be made, minimum quantities, milestones, time period and committed amount.No definition available.false0Long-term Purchase Commitment [Table Text Block]falseLong-Term Contractual Arrangements (Tables)UnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.nu.com/role/LongTermContractualArrangementsTables12