1.0.0.3falseADVERSE POWER PURCHASE COMMITMENT LIABILITYfalse1$falsefalseiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170iso4217_USD_per_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares0sharesStandardhttp://www.xbrl.org/2003/instanceshares053aye_LiabilityForAdversePurchasePowerContractTextBlockayefalsenadurationstringProvides a description and accounting treatment for certain power purchase contracts that are recorded at above market value.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalse00<div>
<p style="MARGIN-TOP: 18px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2"><b>NOTE
20:  ADVERSE POWER PURCHASE COMMITMENT
LIABILITY</b></font></p>
<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">In
May 1998, the Pennsylvania PUC issued an order approving a
transition plan for West Penn. This order was amended by a
settlement agreement approved by the Pennsylvania PUC in
November 1998. West Penn recorded an extraordinary charge in
1998 to reflect the disallowances of certain costs in the order.
This charge included an estimated amount for an adverse power
purchase commitment reflecting the commitment to purchase power at
above-market prices. The adverse power purchase commitment
liability is being amortized over the life of the commitment based
on a schedule of estimated electricity purchases used to determine
the amount of the charge.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">As of
December 31, 2009, Allegheny’s reserve for adverse power
purchase commitments was $132.3 million, including a current
liability of $17.9 million. Allegheny’s liability for adverse
power purchase commitments decreased as follows:</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
 </p>
<table border="0" cellspacing="0" cellpadding="0" width="100%" align="center">
<tr>
<td width="82%"></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom" nowrap="nowrap">
<p style="BORDER-BOTTOM: #000000 1px solid; WIDTH: 41pt">
<font style="FONT-FAMILY: Times New Roman" size="1"><b>(In
millions)</b></font></p>
</td>
<td valign="bottom"><font size="1">  </font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2009</b></font></td>
<td valign="bottom"><font size="1">  </font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2008</b></font></td>
<td valign="bottom"><font size="1">  </font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2007</b></font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Amortization of liability
for adverse power purchase commitments</font></p>
</td>
<td valign="bottom"><font size="1">  </font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">17.5</font></td>
<td valign="bottom"><font size="1">  </font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">17.1</font></td>
<td valign="bottom"><font size="1">  </font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">17.3</font></td>
</tr>
</table>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">These decreases
in the reserve for adverse power purchase commitments are recorded
as expense reductions in “Purchased power and
transmission” on the Consolidated Statements of
Income.</font></p>
</div>NOTE
20:  ADVERSE POWER PURCHASE COMMITMENT
LIABILITY
In
May 1998, the Pennsylvania PUC issued an order approving a
transition plan for WestfalsefalseProvides a description and accounting treatment for certain power purchase contracts that are recorded at above market value.No authoritative reference available.falsefalse11falseUnKnownUnKnownUnKnownfalsetrue