2.2.0.25truefalse11601 - Disclosure - FAIR VALUE DISCLOSUREStruefalsefalse1falsefalseUSDtruefalse{dei_LegalEntityAxis} : PEPCO HOLDINGS INC 1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $Duration_1_1_2010_To_12_31_20105http://www.sec.gov/CIK0001135971duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePEPCO HOLDINGS INCdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ParentCompanyMemberdei_LegalEntityAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.pepcoholdings.com/taxonomy/role/disclosurefairvaluedisclosures1falsefalsefalse00falsefalsefalsefalsefalse1falsefalseUSDtruefalse{dei_LegalEntityAxis} : PEPCO HOLDINGS INC 1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $Duration_1_1_2010_To_12_31_20105http://www.sec.gov/CIK0001135971duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePEPCO HOLDINGS INCdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ParentCompanyMemberdei_LegalEntityAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePEPCO HOLDINGS INC2false0us-gaap_FairValueDisclosuresTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00<div> (16) FAIR VALUE DISCLOSURES Fair Value of Assets and Liabilities Excluding Issued Debt and Equity Instruments PHI has adopted FASB guidance on fair value measurement and disclosures (ASC 820) which established a framework for measuring fair value and expanded disclosures about fair value measurements. As defined in the guidance, fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). PHI utilizes market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs can be readily observable, market corroborated, or generally unobservable. Accordingly, PHI utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. The guidance establishes a fair value hierarchy that prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1) and the lowest priority to unobservable inputs (level 3). PHI classifies its fair value balances in the fair value hierarchy based on the observability of the inputs used in the fair value calculation as follows: Level 1 – Quoted prices are available in active markets for identical assets or liabilities as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis, such as the New York Mercantile Exchange (NYMEX). Level 2 – Pricing inputs are other than quoted prices in active markets included in level 1, which are either directly or indirectly observable as of the reporting date. Level 2 includes those financial instruments that are valued using broker quotes in liquid markets and other observable data. Level 2 also includes those financial instruments that are valued using internally developed methodologies that have been corroborated by observable market data through correlation or by other means. Significant assumptions are observable in the marketplace throughout the full term of the instrument and can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace. The Level 2 derivative instruments primarily consist of electricity derivatives at December 31, 2010. Level 2 power swaps are priced at liquid trading hub prices or valued using the liquid hub prices plus a congestion adder that is calculated using historical regression analysis. Executive deferred compensation plan assets consist of life insurance policies that are categorized as level 2 assets because they are priced based on the assets underlying the policies. The underlying assets of these life insurance policies consist of short-term cash equivalents and fixed income securities that are priced using observable market data. The level 2 liability associated with the life insurance policies represents a deferred compensation obligation, the value of which is tracked via underlying insurance sub-accounts. The sub-accounts are designed to mirror existing mutual funds and money market funds that are observable and actively traded. Level 3 – Pricing inputs include significant inputs that are generally less observable than those from objective sources. Level 3 includes those financial instruments that are valued using models or other valuation methodologies. Derivative instruments categorized as level 3 include natural gas options purchased by DPL as part of a natural gas hedging program approved by the DPSC. Some non-standard assumptions are used in their forward valuation to adjust for the pricing; otherwise, most of the options follow NYMEX valuation. A few of the options have no significant NYMEX components and have to be priced using internal volatility assumptions.   Executive deferred compensation plan assets and liabilities that are classified as level 3 include certain life insurance policies that are valued using the cash surrender value of the policies, which does not represent a quoted price in an active market. The following tables set forth, by level within the fair value hierarchy, PHI's financial assets and liabilities (excluding assets and liabilities held for sale) that were accounted for at fair value on a recurring basis as of December 31, 2010 and 2009. As required by the guidance, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. PHI's assessment of the significance of a particular input to the fair value measurement requires the exercise of judgment, and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels.   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="60%"> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="14" align="center">Fair Value Measurements at December 31, 2010</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom" nowrap="nowrap"> Description</td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Total</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Quoted Prices in Active Markets for Identical Instruments (Level 1) (a)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Other Observable Inputs (Level 2) (a)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Unobservable Inputs (Level 3)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> ASSETS</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Derivative instruments (b)</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Electricity (c)</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">22</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">22</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Cash equivalents</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Treasury Fund</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">17</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">17</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Executive deferred compensation plan assets</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Money Market Funds</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Life Insurance Contracts</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">66</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">47</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">19</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">114</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">26</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">69</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">19</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> LIABILITIES</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Derivative instruments (b)</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Electricity (c)</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">88</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">88</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Natural Gas (d)</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">98</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">75</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">23</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Executive deferred compensation plan liabilities</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Life Insurance Contracts</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">30</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">30</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">216</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">75</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">118</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">23</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table>   <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(a)</td> <td valign="top" align="left">There were no significant transfers of instruments between level 1 and level 2 valuation categories. </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(b)</td> <td valign="top" align="left">The fair value of derivative assets and liabilities reflect netting by counterparty before the impact of collateral. </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(c)</td> <td valign="top" align="left">Represents wholesale electricity futures and swaps that are used mainly as part of Pepco Energy Service's retail energy supply business. </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(d)</td> <td valign="top" align="left">Level 1 instruments represent wholesale gas futures and swaps that are used mainly as part of Pepco Energy Service's retail energy supply business and level 3 instruments represent natural gas options purchased by DPL as part of a natural gas hedging program approved by the DPSC. </td></tr></table>   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="60%"> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="14" align="center">Fair Value Measurements at December 31, 2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom" nowrap="nowrap"> Description</td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Total</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Quoted Prices in Active Markets for Identical Instruments (Level 1)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Other Observable Inputs (Level 2)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Unobservable Inputs (Level 3)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> ASSETS</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Derivative instruments (a)</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Electricity (b)</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">21</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">21</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Cash equivalents</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Treasury Fund</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">36</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">36</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Other </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Executive deferred compensation plan assets</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Money Market Funds</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Life Insurance Contracts</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">62</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">43</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">19</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">133</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">50</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">64</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">19</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> LIABILITIES</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Derivative instruments (a)</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Electricity (b)</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">116</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">116</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Natural Gas (c)</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">113</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">84</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">29</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Executive deferred compensation plan liabilities</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Life Insurance Contracts</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">32</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">32</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">261</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">84</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">148</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">29</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(a)</td> <td valign="top" align="left">The fair value of derivative assets and liabilities reflect netting by counterparty before the impact of collateral. </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(b)</td> <td valign="top" align="left">Represents wholesale electricity futures and swaps that are used mainly as part of Pepco Energy Service's retail energy supply business. </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(c)</td> <td valign="top" align="left">Level 1 instruments represent wholesale gas futures and swaps that are used mainly as part of Pepco Energy Service's retail energy supply business and level 3 instruments represent natural gas options purchased by DPL as part of a natural gas hedging program approved by the DPSC. </td></tr></table> Reconciliations of the beginning and ending balances of PHI's fair value measurements using significant unobservable inputs (Level 3) for the years ended December 31, 2010 and 2009 are shown below:   <table border="0" cellspacing="0" cellpadding="0" width="76%" align="center"> <tr><td width="80%"> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">Year Ended December 31, 2010</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Natural Gas</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Life Insurance Contracts</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Beginning balance as of January 1, 2010</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(29</td> <td valign="bottom" nowrap="nowrap">)</td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">19</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> Total gains or (losses) (realized and unrealized):</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Included in income</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> Included in accumulated other comprehensive loss</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Included in regulatory liabilities</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(16</td> <td valign="bottom" nowrap="nowrap">)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Purchases and issuances</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(3</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Settlements</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">22</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Transfers in (out) of Level 3</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Ending balance as of December 31, 2010</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(23</td> <td valign="bottom" nowrap="nowrap">)</td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">19</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table>   <table border="0" cellspacing="0" cellpadding="0" width="76%" align="center"> <tr><td width="80%"> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">Year Ended December 31, 2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Natural Gas</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Life Insurance Contracts</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Beginning balance as of January 1, 2009</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(24</td> <td valign="bottom" nowrap="nowrap">)</td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">18</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> Total gains or (losses) (realized and unrealized):</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Included in income</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> Included in accumulated other comprehensive loss</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Included in regulatory liabilities</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(18</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Purchases and issuances</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(3</td> <td valign="bottom" nowrap="nowrap">)</td></tr> <tr bgcolor="#cceeff"><td valign="top"> Settlements</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Transfers in (out) of Level 3</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Ending balance as of December 31, 2009</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(29</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">19</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table> The breakdown of realized and unrealized gains or (losses) on level 3 instruments included in income as a component of Other operation and maintenance expense for the periods below were as follows:   <table border="0" cellspacing="0" cellpadding="0" width="76%" align="center"> <tr><td width="82%"> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">Year Ended December 31,</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Total gains included in income for the period</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> Change in unrealized gains relating to assets still held at reporting date</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table> Fair Value of Debt and Equity Instruments The estimated fair values of PHI's issued debt and equity instruments at December 31, 2010 and 2009 are shown below:   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="68%"> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">December 31, 2010</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">December 31, 2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Carrying Amount</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Fair Value</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Carrying Amount</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Fair Value</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Long-Term Debt</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3,665</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4,045</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4,969</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">5,350</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> Transition Bonds issued by ACE Funding</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">367</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">406</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">402</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">427</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Long-Term Project Funding</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">19</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">19</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">20</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">20</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> Redeemable Serial Preferred Stock</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap"> </td></tr></table>   The fair value of Long-Term Debt issued by PHI and its utility subsidiaries was based on actual trade prices as of December 31, 2010 and 2009. Where trade prices were not available, bid prices obtained from brokers or a discounted cash flow model were used to estimate fair value. The fair values of Transition Bonds issued by ACE Funding, including amounts due within one year, were derived based on bid prices obtained from brokers because actual trade prices were not available. The fair value of the Redeemable Serial Preferred Stock, was derived based on quoted market prices. The carrying amounts of all other financial instruments in the accompanying financial statements approximate fair value. </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis item represents the complete disclosure regarding the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the Company is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risk is are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15B -Subparagraph a, b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 3, 10, 14, 15 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44A, 44B Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32, 33, 34 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15C, 15D Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15A -Subparagraph a-d Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 17-22, 27, 28 falsefalseFAIR VALUE DISCLOSURES3false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.pepcoholdings.com/taxonomy/role/disclosurefairvaluedisclosures1falsefalsefalse00falsefalsefalsefalsefalse2falsefalseUSDtruefalse{dei_LegalEntityAxis} : ATLANTIC CITY ELECTRIC CO 1/1/2010 - 12/31/2010 USD ($) $Duration_1_1_2010_To_12_31_20102http://www.sec.gov/CIK0001135971duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseATLANTIC CITY ELECTRIC COdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldipom_AtlanticCityElectricCoMemberdei_LegalEntityAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseATLANTIC CITY ELECTRIC CO4false0us-gaap_FairValueDisclosuresTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00<div> (13) FAIR VALUE DISCLOSURES Fair Value of Assets and Liabilities Excluding Issued Debt and Equity Instruments ACE has adopted FASB guidance on fair value measurement and disclosures (ASC 820) which established a framework for measuring fair value and expanded disclosures about fair value measurements. As defined in the guidance, fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). ACE utilizes market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs can be readily observable, market corroborated, or generally unobservable. Accordingly, ACE utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. The guidance establishes a fair value hierarchy that prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1) and the lowest priority to unobservable inputs (level 3). ACE classifies its fair value balances in the fair value hierarchy based on the observability of the inputs used in the fair value calculation as follows: Level 1 – Quoted prices are available in active markets for identical assets or liabilities as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2 – Pricing inputs are other than quoted prices in active markets included in level 1, which are either directly or indirectly observable as of the reporting date. Level 2 includes those financial instruments that are valued using broker quotes in liquid markets and other observable data. Level 2 also includes those financial instruments that are valued using internally developed methodologies that have been corroborated by observable market data through correlation or by other means. Significant assumptions are observable in the marketplace throughout the full term of the instrument and can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace. Executive deferred compensation plan assets consist of life insurance policies that are categorized as level 2 assets because their fair value is based on the fair value of the assets underlying the policies. The underlying assets of these life insurance policies consist of short-term cash equivalents and fixed income securities that are priced using observable market data. The level 2 liability associated with the life insurance policies represents a deferred compensation obligation, the value of which is tracked via underlying insurance sub-accounts. The sub-accounts are designed to mirror existing mutual funds and money market funds that are observable and actively traded. Level 3 – Pricing inputs include significant inputs that are generally less observable than those from objective sources. Level 3 includes those financial investments that are valued using models or other valuation methodologies. The following tables set forth by level within the fair value hierarchy ACE's financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2010 and 2009. As required by the guidance, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. ACE's assessment of the significance of a particular input to the fair value measurement requires the exercise of judgment, and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels.   <table border="0" cellspacing="0" cellpadding="0" width="100%" align="center"> <tr><td width="65%"> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="14" align="center">Fair Value Measurements at December 31, 2010</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom" nowrap="nowrap"> Description</td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Total</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Quoted Prices in Active Markets for Identical Instruments (Level 1) (a)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Other Observable Inputs (Level 2) (a)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Unobservable Inputs (Level 3)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> ASSETS</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Cash equivalents</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Treasury Fund</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">17</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">17</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">17</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">17</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> LIABILITIES</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Executive deferred compensation plan liabilities</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Life Insurance Contracts</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table>   <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(a)</td> <td valign="top" align="left">There were no significant transfers of instruments between level 1 and level 2 valuation categories. </td></tr></table>   <table border="0" cellspacing="0" cellpadding="0" width="100%" align="center"> <tr><td width="65%"> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="14" align="center">Fair Value Measurements at December 31, 2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom" nowrap="nowrap"> Description</td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Total</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Quoted Prices in Active Markets for Identical Instruments (Level 1)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Other Observable Inputs (Level 2)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Unobservable Inputs (Level 3)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> ASSETS</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" colspan="13"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Cash equivalents</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Treasury Fund</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">17</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">17</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">17</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">17</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> LIABILITIES</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Executive deferred compensation plan liabilities</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Life Insurance Contracts</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table> Fair Value of Debt and Equity Instruments The estimated fair values of ACE's issued debt and equity instruments at December 31, 2010 and 2009 are shown below:   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="72%"> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">December 31, 2010</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">December 31, 2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Carrying Amount</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Fair Value</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Carrying Amount</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Fair Value</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Long-Term Debt</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">633</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">710</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">610</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">674</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> Transition Bonds issued by ACE Funding</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">367</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">406</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">402</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">427</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Redeemable Serial Preferred Stock</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap"> </td></tr></table>   The fair value of long-term debt issued by ACE was based on actual trade prices as of December 31, 2010 and 2009, or a discounted cash flow model where actual trade prices were not available. The fair values of Transition Bonds issued by ACE Funding, including amounts due within one year, were derived based on bid prices obtained from brokers where actual trade prices were not available. The fair value of the Redeemable Serial Preferred Stock was derived based on quoted market prices. The carrying amounts of all other financial instruments in the accompanying financial statements approximate fair value. </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis item represents the complete disclosure regarding the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the Company is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risk is are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15B -Subparagraph a, b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 3, 10, 14, 15 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44A, 44B Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32, 33, 34 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15C, 15D Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15A -Subparagraph a-d Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 17-22, 27, 28 falsefalseFAIR VALUE DISCLOSURES5false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.pepcoholdings.com/taxonomy/role/disclosurefairvaluedisclosures1falsefalsefalse00falsefalsefalsefalsefalse3falsefalseUSDtruefalse{dei_LegalEntityAxis} : DELMARVA POWER & LIGHT CO /DE/ 1/1/2010 - 12/31/2010 USD ($) $Duration_1_1_2010_To_12_31_20103http://www.sec.gov/CIK0001135971duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseDELMARVA POWER & LIGHT CO /DE/dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldipom_DelmarvaPowerLightCoMemberdei_LegalEntityAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseDELMARVA POWER & LIGHT CO /DE/6false0us-gaap_FairValueDisclosuresTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00<div> (14) FAIR VALUE DISCLOSURES Fair Value of Assets and Liabilities Excluding Issued Debt and Equity Instruments DPL has adopted FASB guidance on fair value measurement and disclosures (ASC 820) which established a framework for measuring fair value and expanded disclosures about fair value measurements. As defined in the guidance, fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). DPL utilizes market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs can be readily observable, market corroborated, or generally unobservable. Accordingly, DPL utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. The guidance establishes a fair value hierarchy that prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1) and the lowest priority to unobservable inputs (level 3). DPL classifies its fair value balances in the fair value hierarchy based on the observability of the inputs used in the fair value calculation as follows: Level 1 – Quoted prices are available in active markets for identical assets or liabilities as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis, such as the New York Mercantile Exchange (NYMEX).   Level 2 – Pricing inputs are other than quoted prices in active markets included in level 1, which are either directly or indirectly observable as of the reporting date. Level 2 includes those financial instruments that are valued using broker quotes in liquid markets and other observable data. Level 2 also includes those financial instruments that are valued using internally developed methodologies that have been corroborated by observable market data through correlation or by other means. Significant assumptions are observable in the marketplace throughout the full term of the instrument and can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace. The level 2 liability associated with the life insurance policies represents a deferred compensation obligation, the value of which is tracked via underlying insurance sub-accounts. The sub-accounts are designed to mirror existing mutual funds and money market funds that are observable and actively traded. Level 3 – Pricing inputs include significant inputs that are generally less observable than those from objective sources. Level 3 includes those financial instruments that are valued using models or other valuation methodologies. Derivative instruments categorized as level 3 include natural gas options purchased by DPL as part of a natural gas hedging program approved by the DPSC. Some non-standard assumptions are used in their forward valuation to adjust for the pricing; otherwise, most of the options follow NYMEX valuation. A few of the options have no significant NYMEX components, and have to be priced using internal volatility assumptions. Executive deferred compensation plan assets and liabilities that are classified as level 3 include certain life insurance policies that are valued using the cash surrender value of the policies, which does not represent a quoted price in an active market. The following tables set forth, by level within the fair value hierarchy, DPL's financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2010 and 2009. As required by the guidance, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. DPL's assessment of the significance of a particular input to the fair value measurement requires the exercise of judgment, and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels.   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="59%"> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="14" align="center">Fair Value Measurements at December 31, 2010</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom" nowrap="nowrap"> Description</td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Total</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Quoted Prices in Active Markets for Identical Instruments (Level 1) (a)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Other Observable Inputs (Level 2) (a)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Unobservable Inputs (Level 3)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> ASSETS</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Executive deferred compensation plan assets</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Money Market Funds</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Life Insurance Contracts</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> LIABILITIES</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Derivative instruments (b)</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Natural Gas (c)</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">29</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">6</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">23</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">29</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">6</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">23</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table>   <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(a)</td> <td valign="top" align="left">There were no significant transfers of instruments between level 1 and level 2 valuation categories. </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(b)</td> <td valign="top" align="left">The fair value of derivative liabilities reflect netting by counterparty before the impact of collateral. </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(c)</td> <td valign="top" align="left">Represents natural gas options purchased by DPL as part of a natural gas hedging program approved by the DPSC. </td></tr></table>   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="58%"> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="14" align="center">Fair Value Measurements at December 31, 2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom" nowrap="nowrap"> Description</td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Total</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Quoted Prices in Active Markets for Identical Instruments (Level 1)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Other Observable Inputs (Level 2)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Unobservable Inputs (Level 3)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> ASSETS</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Cash equivalents</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Treasury Fund</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">19</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">19</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Executive deferred compensation plan assets</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Money Market Funds</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Life Insurance Contracts</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">23</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">22</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> LIABILITIES</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Derivative instruments (a)</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Natural Gas (b)</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">39</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">10</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">29</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Executive deferred compensation plan liabilities</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Life Insurance Contracts</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">40</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">10</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">29</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table>   <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(a)</td> <td valign="top" align="left">The fair value of derivative liabilities reflect netting by counterparty before the impact of collateral. </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(b)</td> <td valign="top" align="left">Represents natural gas options purchased by DPL as part of a natural gas hedging program approved by the DPSC. </td></tr></table>   Reconciliations of the beginning and ending balances of DPL's fair value measurements using significant unobservable inputs (Level 3) for the year ended December 31, 2010 and 2009 are shown below:   <table border="0" cellspacing="0" cellpadding="0" width="76%" align="center"> <tr><td width="81%"> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">Year Ended December 31, 2010</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Natural Gas</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Life Insurance Contracts</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Beginning balance as of January 1, 2010</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(29</td> <td valign="bottom" nowrap="nowrap">)</td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> Total gains or (losses) (realized and unrealized):</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Included in income</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Included in accumulated other comprehensive loss</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Included in regulatory liabilities</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(16</td> <td valign="bottom" nowrap="nowrap">)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Purchases and issuances</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Settlements</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">22</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Transfers in (out) of Level 3</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Ending balance as of December 31, 2010</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(23</td> <td valign="bottom" nowrap="nowrap">)</td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table>   <table border="0" cellspacing="0" cellpadding="0" width="76%" align="center"> <tr><td width="81%"> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">Year Ended December 31, 2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Natural Gas</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Life Insurance Contracts</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Beginning balance as of January 1, 2009</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(24</td> <td valign="bottom" nowrap="nowrap">)</td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> Total gains or (losses) (realized and unrealized):</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Included in income</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Included in accumulated other comprehensive loss</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Included in regulatory liabilities</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(18</td> <td valign="bottom" nowrap="nowrap">)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Purchases and issuances</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Settlements</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Transfers in (out) of Level 3</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Ending balance as of December 31, 2009</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(29</td> <td valign="bottom" nowrap="nowrap">)</td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table> Fair Value of Debt and Equity Instruments The estimated fair values of DPL's issued debt and equity instruments as of December 31, 2010 and 2009 are shown below:   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="72%"> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">December 31, 2010</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">December 31, 2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Carrying Amount</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Fair Value</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Carrying Amount</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Fair Value</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Long-Term Debt</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">765</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">822</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">686</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">733</td> <td valign="bottom" nowrap="nowrap"> </td></tr></table> The fair value of long-term debt issued by DPL was based on actual trade prices as of December 31, 2010 and 2009, bid prices obtained from brokers or a discounted cash flow model where actual trade prices were not available. The carrying amounts of all other financial instruments in the accompanying financial statements approximate fair value. </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis item represents the complete disclosure regarding the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the Company is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risk is are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15B -Subparagraph a, b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 3, 10, 14, 15 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44A, 44B Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32, 33, 34 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15C, 15D Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15A -Subparagraph a-d Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 17-22, 27, 28 falsefalseFAIR VALUE DISCLOSURES7false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.pepcoholdings.com/taxonomy/role/disclosurefairvaluedisclosures1falsefalsefalse00falsefalsefalsefalsefalse4falsefalseUSDtruefalse{dei_LegalEntityAxis} : POTOMAC ELECTRIC POWER CO 1/1/2010 - 12/31/2010 USD ($) $Duration_1_1_2010_To_12_31_20104http://www.sec.gov/CIK0001135971duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePOTOMAC ELECTRIC POWER COdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldipom_PotomacElectricPowerCoMemberdei_LegalEntityAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePOTOMAC ELECTRIC POWER CO8false0us-gaap_FairValueDisclosuresTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00<div> (12) FAIR VALUE DISCLOSURES Fair Value of Assets and Liabilities Excluding Issued Debt and Equity Instruments Pepco has adopted FASB guidance on fair value measurement and disclosures (ASC 820) which established a framework for measuring fair value and expanded disclosures about fair value measurements. As defined in the guidance, fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). Pepco utilizes market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs can be readily observable, market corroborated, or generally unobservable. Accordingly, Pepco utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. The guidance establishes a fair value hierarchy that prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1) and the lowest priority to unobservable inputs (level 3). Pepco classifies its fair value balances in the fair value hierarchy based on the observability of the inputs used in the fair value calculation as follows: Level 1 – Quoted prices are available in active markets for identical assets or liabilities as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2 – Pricing inputs are other than quoted prices in active markets included in level 1, which are either directly or indirectly observable as of the reporting date. Level 2 includes those financial instruments that are valued using broker quotes in liquid markets and other observable data. Level 2 also includes those financial instruments that are valued using internally developed methodologies that have been corroborated by observable market data through correlation or by other means. Significant assumptions are observable in the marketplace throughout the full term of the instrument and can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace. Executive deferred compensation plan assets consist of life insurance policies that are categorized as level 2 assets because their fair value is based on the fair value of the assets underlying the policies. The underlying assets of these life insurance policies consist of short-term cash equivalents and fixed income securities that are priced using observable market data. The level 2 liability associated with the life insurance policies represents a deferred compensation obligation, the value of which is tracked via underlying insurance sub-accounts. The sub-accounts are designed to mirror existing mutual funds and money market funds that are observable and actively traded. Level 3 – Pricing inputs include significant inputs that are generally less observable than those from objective sources. Level 3 includes those financial instruments that are valued using models or other valuation methodologies. Executive deferred compensation plan assets and liabilities that are classified as level 3 include certain life insurance policies that are valued using the cash surrender value of the policies, which does not represent a quoted price in an active market. The following tables set forth, by level within the fair value hierarchy, Pepco's financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2010 and 2009. As required by the guidance, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Pepco's assessment of the significance of a particular input to the fair value measurement requires the exercise of judgment, and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels.   <table border="0" cellspacing="0" cellpadding="0" width="100%" align="center"> <tr><td width="65%"> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="7%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="14" align="center">Fair Value Measurements at December 31, 2010</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom" nowrap="nowrap"> Description</td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Total</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Quoted Prices in Active Markets for Identical Instruments (Level 1) (a)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Other Observable Inputs (Level 2) (a)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Unobservable Inputs (Level 3)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> ASSETS</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Executive deferred compensation plan assets</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Money Market Funds</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">6</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">6</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Life Insurance Contracts</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">59</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">41</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">18</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">65</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">6</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">41</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">18</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> LIABILITIES</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Executive deferred compensation plan liabilities</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Life Insurance Contracts</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top" colspan="16"> (a)    There were no significant transfers of instruments between level 1 and level 2 valuation categories.  </td> <td valign="top">    </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="14" align="center">Fair Value Measurements at December 31, 2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom" nowrap="nowrap"> Description</td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Total</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Quoted Prices in Active Markets for Identical Instruments (Level 1)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Other Observable Inputs (Level 2)</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Significant Unobservable Inputs (Level 3)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> ASSETS</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Executive deferred compensation plan assets</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Money Market Funds</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">9</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">9</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Life Insurance Contracts</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">55</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">37</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">18</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">64</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">9</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">37</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">18</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> LIABILITIES</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Executive deferred compensation plan liabilities</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Life Insurance Contracts</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">13</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">13</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">13</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">13</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table>   Reconciliations of the beginning and ending balances of Pepco's fair value measurements using significant unobservable inputs (Level 3) for the years ended December 31, 2010 and 2009 are shown below.   <table border="0" cellspacing="0" cellpadding="0" width="76%" align="center"> <tr><td width="76%"> </td> <td valign="bottom" width="10%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="10%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">Life Insurance Contracts</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" align="center">Year Ended December 31,</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Beginning balance as of January 1,</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">18</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">17</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> Total gains or (losses) (realized and unrealized):</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Included in income</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> Included in accumulated other comprehensive loss</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Purchases and issuances</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(3</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(3</td> <td valign="bottom" nowrap="nowrap">)</td></tr> <tr><td valign="top"> Settlements</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Transfers in (out) of Level 3</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> Ending balance as of December 31,</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">18</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">18</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table> The breakdown of realized and unrealized gains or (losses) on level 3 instruments included in income as a component of Other operation and maintenance expense for the periods below were as follows:   <table border="0" cellspacing="0" cellpadding="0" width="76%" align="center"> <tr><td width="82%"> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="8%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" align="center"> Year Ended December 31,</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Total gains included in income for the period</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> Change in unrealized gains relating to assets still held at reporting date</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td style="border-top: #000000 3px double;" valign="bottom"> </td> <td> </td></tr></table> Fair Value of Debt and Equity Instruments The estimated fair values of Pepco's issued debt and equity instruments at December 31, 2010 and 2009 are shown below:   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="68%"> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">December 31, 2010</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">December 31, 2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Carrying Amount</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Fair Value</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Carrying Amount</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Fair Value</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Long-Term Debt</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,540</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,722</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,555</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,707</td> <td valign="bottom" nowrap="nowrap"> </td></tr></table> The fair value of long-term debt issued by Pepco was based on actual trade prices as of December 31, 2010 and 2009. The carrying amounts of all other financial instruments in the accompanying financial statements approximate fair value. </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis item represents the complete disclosure regarding the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the Company is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risk is are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15B -Subparagraph a, b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 3, 10, 14, 15 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44A, 44B Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32, 33, 34 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15C, 15D Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15A -Subparagraph a-d Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 17-22, 27, 28 falsefalseFAIR VALUE DISCLOSURES18FAIR VALUE DISCLOSURESUnKnownUnKnownUnKnownUnKnownfalsetrue