2.2.0.25truefalse11001 - Disclosure - PENSION AND OTHER POSTRETIREMENT BENEFITStruefalsefalse1falsefalseUSDtruefalse{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$1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.pepcoholdings.com/taxonomy/role/disclosurepensionandotherpostretirementbenefits1falsefalsefalse00falsefalsefalsefalsefalse1falsefalseUSDtruefalse{dei_LegalEntityAxis} : PEPCO HOLDINGS INC 1/1/2010 - 12/31/2010 USD ($) 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_PensionAndOtherPostretirementBenefitsDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<div> (10) PENSION AND OTHER POSTRETIREMENT BENEFITS Pension Benefits and Other Postretirement Benefits Pepco Holdings sponsors the PHI Retirement Plan, which covers substantially all employees of Pepco, DPL, ACE and certain employees of other Pepco Holdings' subsidiaries. Pepco Holdings also provides supplemental retirement benefits to certain eligible executive and key employees through nonqualified retirement plans. Pepco Holdings provides certain postretirement health care and life insurance benefits for eligible retired employees. Most employees hired on January 1, 2005 or later will not have company subsidized retiree medical coverage; however, they will be able to purchase coverage at full cost through PHI. Net periodic benefit cost is included in other operation and maintenance expense, net of the portion of the net periodic benefit cost that is capitalized as part of the cost of labor for internal construction projects. After intercompany allocations, the three utility subsidiaries are responsible for substantially all of the total PHI net periodic benefit cost. Pepco Holdings accounts for the PHI Retirement Plan, nonqualified retirement plans, and its postretirement health care and life insurance benefits for eligible employees in accordance with FASB guidance on retirement benefits. PHI's financial statement disclosures are also prepared in accordance with FASB guidance on retirement benefits.   All amounts in the following tables are in millions of dollars:   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="74%"> </td> <td valign="bottom" width="3%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="3%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="3%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="3%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom" nowrap="nowrap"> At December 31,</td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">Pension Benefits</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">Other Postretirement Benefits</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> <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 bgcolor="#cceeff"><td valign="top"> Change in Benefit Obligation</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <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"> Benefit obligation at beginning of year</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,796</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,753</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">651</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">653</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Service cost</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">35</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">5</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Interest cost</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">110</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">111</td> <td valign="bottom" nowrap="nowrap">  </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">40</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Amendments</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(7</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><td valign="top"> Actuarial loss (gain)</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">179</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">72</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">42</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></tr> <tr bgcolor="#cceeff"><td valign="top"> Benefits paid (a)</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(146</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(177</td> <td valign="bottom" nowrap="nowrap">) </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">(39</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr><td valign="top"> Termination benefits</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">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></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"> Benefit obligation at end of year</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,970</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,796</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">704</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">651</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"> Change in 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"> Fair value of plan assets at beginning of year</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,500</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,123</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">242</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">192</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Actual return on plan assets</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">173</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">248</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">40</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Company contributions</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">105</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">306</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">46</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">49</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Benefits paid (a)</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(146</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(177</td> <td valign="bottom" nowrap="nowrap">)</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">(39</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"> Fair value of plan assets at end of year</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,632</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,500</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">275</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">242</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"> Funded Status at end of year (plan assets less plan obligations)</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(338</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(296</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(429</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(409</td> <td valign="bottom" nowrap="nowrap">) </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">Other Postretirement Benefits paid is net of Medicare Part D subsidy receipts of $3 million in 2010 and $3 million in 2009. </td></tr></table> At December 31, 2010, PHI Retirement Plan assets were $1.6 billion and the accumulated benefit obligation (ABO) was approximately $1.9 billion. At December 31, 2009, PHI's Retirement Plan assets were approximately $1.5 billion and the ABO was approximately $1.6 billion. The following table provides the amounts recognized in PHI's consolidated balance sheets as of December 31, in millions of dollars:   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="74%"> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">Pension Benefits</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">Other Postretirement Benefits</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">2009</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">2009</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Regulatory asset</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">655</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">583</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">193</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">169</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Current liabilities</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 bgcolor="#cceeff"><td valign="top"> Pension benefit obligation</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(332</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(290</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 postretirement benefit obligations</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">(429</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(409</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Deferred income taxes, net</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">12</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> <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"> Accumulated other comprehensive loss, net of tax</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 bgcolor="#cceeff"><td valign="top"> Net amount recognized</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">346</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">315</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(236</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(240</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>   Amounts included in AOCL (pre-tax) and regulatory assets at December 31, in millions of dollars, consist of:   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="75%"> </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">Pension Benefits</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" align="center">Other Postretirement Benefits</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> <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 bgcolor="#cceeff"><td valign="top"> Unrecognized net actuarial loss</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">692</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">611</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">208</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">188</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Unamortized prior service cost (credit)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(8</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(17</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(21</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Unamortized transition liability</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">2</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">2</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"> Total</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">684</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">611</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">193</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">169</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"> Accumulated other comprehensive loss ($17 million, net of tax, at December 31, 2010 and 2009)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">29</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">28</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Regulatory assets</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">655</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">583</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">193</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">169</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td style="border-top: #000000 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Total</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">684</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">611</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">193</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">169</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> The estimated net actuarial loss and prior service cost for the defined benefit pension plans that will be amortized from AOCL into net periodic benefit cost over the next reporting year are $48 million and $1 million, respectively. The estimated net loss and prior service credit for the other postretirement benefit plan that will be amortized from AOCL into net periodic benefit cost over the next reporting year are $12 million and $4 million, respectively. The table below provides the components of net periodic benefit costs recognized for the years ended December 31, in millions of dollars:   <table border="0" cellspacing="0" cellpadding="0" width="100%" align="center"> <tr><td width="70%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="2%"> </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="10" align="center">Pension Benefits</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="10" align="center">Other Postretirement Benefits</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> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">2008</td> <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> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">2008</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Service cost</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">35</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">36</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">36</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">5</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">7</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">7</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Interest cost</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">110</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">111</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">108</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">39</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">40</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">40</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Expected return on plan assets</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(117</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(101</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(130</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(16</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(13</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(16</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr><td valign="top"> Amortization of prior service cost</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(5</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(4</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(4</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Amortization of net actuarial loss</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">42</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">56</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">10</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">13</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">16</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">13</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Recognition of benefit contract</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Plan amendments</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Termination benefits</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">3</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">6</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" 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> <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"> Net periodic benefit cost</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">74</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">103</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">24</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">42</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">46</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">40</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> <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 table below provides the split of the combined pension and other postretirement net periodic benefit costs among subsidiaries for the years ended December 31, in million of dollars:   <table border="0" cellspacing="0" cellpadding="0" width="84%" align="center"> <tr><td width="83%"> </td> <td valign="bottom" width="3%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="3%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="3%"> </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="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> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">2008</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Pepco</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">$</td> <td valign="bottom" align="right">38</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">24</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> DPL</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">28</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">25</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"> ACE</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">20</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">12</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Other subsidiaries</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">25</td> <td valign="bottom" nowrap="nowrap">  </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">25</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></tr> <tr bgcolor="#cceeff"><td valign="top"> Total</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">149</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></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></tr></table>   The following weighted average assumptions were used to determine the benefit obligations at December 31:   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="76%"> </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" nowrap="nowrap" align="center">Pension Benefits</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="6" nowrap="nowrap" align="center">Other Postretirement Benefits</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" nowrap="nowrap" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">2009</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">2009</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Discount rate</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.65</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">6.40</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.60</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">6.30</td> <td valign="bottom" nowrap="nowrap">% </td></tr> <tr><td valign="top"> Rate of compensation increase</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Health care cost trend rate assumed for current year</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">7.50</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">8.00</td> <td valign="bottom" nowrap="nowrap">% </td></tr> <tr><td valign="top"> Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Year that the cost trend rate reaches the ultimate trend rate</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">2015</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">2015</td> <td valign="bottom" nowrap="nowrap">  </td></tr></table> Assumed health care cost trend rates may have a significant effect on the amounts reported for the health care plans. A one-percentage-point change in assumed health care cost trend rates would have the following effects, in millions of dollars:   <table border="0" cellspacing="0" cellpadding="0" width="84%" align="center"> <tr><td width="72%"> </td> <td valign="bottom" width="12%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="12%"> </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="2" nowrap="nowrap" align="center">1-Percentage- Point Increase</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">1-Percentage- Point Decrease</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Increase (decrease) in total service and interest cost</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">2</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">  </td> <td valign="bottom" nowrap="nowrap">(2) </td></tr> <tr><td valign="top"> Increase (decrease) in postretirement benefit obligation</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right"> 32</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">  </td> <td valign="bottom" nowrap="nowrap">(28) </td></tr></table> The following weighted average assumptions were used to determine the net periodic benefit cost for the years ended December 31:   <table border="0" cellspacing="0" cellpadding="0" width="100%" align="center"> <tr><td width="76%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="2%"> </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="10" nowrap="nowrap" align="center">Pension Benefits</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="10" nowrap="nowrap" align="center">Other Postretirement Benefits</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" nowrap="nowrap" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">2009</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">2008</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">2009</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">2008</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Discount rate</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">6.40</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">6.50</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">6.25</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">6.30</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">6.50</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">6.25</td> <td valign="bottom" nowrap="nowrap">% </td></tr> <tr><td valign="top"> Expected long-term return on plan assets</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">8.00</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">8.25</td> <td valign="bottom" nowrap="nowrap">%</td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">8.25</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">8.00</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">8.25</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">8.25</td> <td valign="bottom" nowrap="nowrap">% </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Rate of compensation increase</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td></tr></table> PHI utilizes an analytical tool developed by its actuaries to select the discount rate. The analytical tool utilizes a high-quality bond portfolio with cash flows that match the benefit payments expected to be made under the plans. In selecting an expected rate of return on plan assets, PHI considers actual historical returns, economic forecasts and the judgment of its investment consultants on expected long-term performance for the types of investments held by the plan. The estimated asset class returns are weighted by PHI's target asset allocation. The plan assets consist of equity, fixed income, real estate and private equity investments, and when viewed over a long-term horizon, are expected to yield a return on assets of 8.00% at December 31, 2010. PHI periodically reviews its asset mix and rebalances assets back to the target allocation. In 2008, PHI and its actuaries conducted an experience study, a periodic analysis of plan experience against actuarial assumptions. The study reviewed withdrawal, retirement and salary increase assumptions. As a result of the study, assumed retirement rates were changed and the age-related salary scale assumption was increased from 4.50% to 5.00% over an average employee's career. No changes were made for the 2010 and 2009 valuations.   In addition, for the 2008 Other Postretirement Benefit Plan valuation, the medical trend rate was changed to 8.5%, declining 0.5% per year to 5.00% in 2015 and beyond, from the 2007 valuation assumption for 2008 of 7%, declining 1% per year to 5% in 2010 and beyond. No changes were made for the 2010 and 2009 valuations. Plan Assets Investment Policies and Strategies The goal of PHI's investment policy is to preserve capital and maximize investment earnings in excess of inflation within acceptable levels of volatility to meet the actuarial projected liabilities of the benefit plans. To accomplish this goal, PHI actively manages its plan assets with the objective of optimizing long-term returns while maintaining a high standard of portfolio quality and proper diversification. In developing its allocation policy for the assets in the PHI Retirement Plan and the other postretirement benefit plan, PHI examined projections of asset returns and volatility over a long-term horizon. In connection with this analysis, PHI evaluated the risk return tradeoffs of alternative asset classes and asset mixes given long-term historical relationships as well as prospective capital market returns. PHI also conducted an asset liability study to match projected asset growth with projected liability growth to determine whether there is sufficient liquidity for projected benefit payments. PHI developed its asset mix guidelines by incorporating the results of these analyses with an assessment of its risk posture, and taking into account industry practices. Under these guidelines, PHI diversifies assets in order to protect against large investment losses and to reduce the probability of excessive volatility while earning a return that is commensurate with an acceptable risk level. Assets are diversified by allocating investments to various asset classes and investment styles within those asset classes and by retaining investment management firms with complementary investment styles and approaches. Based on the assessment of employee demographics, actuarial funding, and PHI's business and financial circumstances, PHI believes that its risk posture is slightly below average relative to other pension plans. On a periodic basis, PHI reviews its asset mix and rebalances assets back to the target allocation over a reasonable period of time. The PHI Retirement Plan asset allocations at December 31, 2010 and 2009, by asset category, were as follows:   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="68%"> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom" rowspan="2"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" nowrap="nowrap" align="center">Plan Assets at December 31,</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" rowspan="2" colspan="2" nowrap="nowrap" align="center">Target Plan Asset Allocation</td> <td valign="bottom" rowspan="2"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" rowspan="2" colspan="2" nowrap="nowrap" align="center">Minimum  Maximum</td> <td valign="bottom" rowspan="2"> </td></tr> <tr><td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">2009</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Asset Category</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <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"> Equity</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">53</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">56</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">60</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">55% - 65%</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Fixed Income</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">40</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">37</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">30</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">30% - 50%</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Other (real estate, private equity)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">7</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">7</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">10</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">0% - 10%</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 valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Total</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">100</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">100</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">100</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </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 valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr></table>   PHI's other postretirement benefit plan asset allocations at December 31, 2010 and 2009, by asset category, were as follows:   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="68%"> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom" rowspan="2">  </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" nowrap="nowrap" align="center">Plan Assets at December 31,</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" rowspan="2" colspan="2" nowrap="nowrap" align="center">Target Plan Asset Allocation</td> <td valign="bottom" rowspan="2"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" rowspan="2" colspan="2" nowrap="nowrap" align="center">Minimum  Maximum</td> <td valign="bottom" rowspan="2"> </td></tr> <tr><td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">2009</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Asset Category</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <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"> Equity</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">61</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">60</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">60</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">55% - 65%</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Fixed Income</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">35</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">35</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">35</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">20% - 50%</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Cash</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">4</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">0% - 10%</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 valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Total</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">100</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">100</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">100</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </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 valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr></table> Risk Management and General Investment Manager Guidelines Plan assets may be invested in separately managed accounts in which there is ownership of individual securities, shares of commingled funds or mutual funds, or limited partnerships. Commingled funds and mutual funds are subject to detailed policy guidelines set forth in the fund's prospectus or fund declaration, and limited partnerships are subject to the terms of the partnership agreement. Separate account investment managers are responsible for achieving a level of diversification in their portfolio that is consistent with their investment approach and their role in PHI's overall investment structure. Separate account investment managers must follow risk management guidelines established by PHI unless authorized in writing by PHI. For equity managers, the maximum position in a single issuer's securities should not exceed 5% of the portfolio's cost or 8% of the portfolio's market value. The holdings in any one industry should not exceed 25% of the portfolio's market value, and the holdings in any one economic sector should not exceed 40% of the portfolio's market value. International equity managers should not invest more than 25% of the portfolio's market value in emerging markets and no more than 50% in any single country. Market and currency hedges are limited to defensive purposes. For fixed income managers, the maximum position in a single issuer's securities should not exceed 5% of the portfolio's market value, with the exception of US Treasury or US Government agencies and instrumentalities. The investment manager is expected to maintain a weighted average bond portfolio quality rating of at least "A." The manager may invest up to 20% of the portfolio's market value in bonds rated below investment grade. A manager may invest in non-dollar securities up to 20% of the portfolio's market value, and currency hedging is allowed if it is a normal approach to international fixed income management. No more than 30% of the portfolio's market value can be invested in combined non-dollar and below investment grade securities. Derivative instruments are permissible in an investment portfolio to the extent they comply with policy guidelines and are consistent with risk and return objectives. Under no circumstances may such instruments be used speculatively or to leverage the portfolio. PHI common stock is not a permitted plan asset. Fair Value of Plan Assets As defined in the FASB guidance on fair value measurement and disclosures (ASC 820), 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. The FASB's fair value framework includes a hierarchy that prioritizes the inputs to valuation techniques 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). If the inputs used to measure the financial instruments fall within different levels of the hierarchy, the categorization is based on the lowest level input that is significant to the fair value measurement of the instrument. Investments are classified within the fair value hierarchy as follows:   <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="3%" align="left">•</td> <td valign="top" width="1%"> </td> <td valign="top" align="left"> Level 1: Investments are valued using quoted prices in active markets for identical investments. </td></tr></table>   <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="3%" align="left">•</td> <td valign="top" width="1%"> </td> <td valign="top" align="left"> Level 2: Investments are valued using other significant observable inputs (e.g., quoted prices for similar investments, interest rates, credit risks, etc). </td></tr></table>   <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="3%" align="left">•</td> <td valign="top" width="1%"> </td> <td valign="top" align="left"> Level 3: Investments are valued using significant unobservable inputs, including internal assumptions. </td></tr></table> The following tables present the fair values of PHI's Retirement Plan and other postretirement benefit plan assets by asset category within the fair value hierarchy levels, as of December 31, 2010 and 2009:   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="62%"> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="6%"> </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" nowrap="nowrap" align="center">Fair Value Measurements at December 31, 2010</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" nowrap="nowrap" 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" nowrap="nowrap" align="center">Total</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" 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" nowrap="nowrap" 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" nowrap="nowrap" align="center">Significant Unobservable Inputs (Level 3)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Asset Category</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <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"> Pension 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"> Equity</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <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"> Domestic (a)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">573</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">334</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">212</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">27</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> International (b)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">270</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">265</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">2</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">3</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Fixed Income (c)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">604</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">397</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">204</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">3</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Other</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <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"> Private Equity</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">62</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">62</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Real Estate</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">55</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">55</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Cash Equivalents (d)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">68</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">68</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" 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"> Pension Plan Assets Subtotal</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">1,632</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">1,064</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">418</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">150</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"> Other Postretirement 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"> Equity (e)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">168</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">145</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">23</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Fixed Income (f)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">96</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">96</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Cash Equivalents</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">11</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">11</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" 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"> Postretirement Plan Assets Subtotal</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">275</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">252</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">23</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" 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"> Total Pension and Other Postretirement Plan Assets</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">1,907</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">1,316</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">441</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">150</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">(b)</td> <td valign="top" align="left">Predominantly includes domestic common stock and commingled funds. </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">Predominantly includes foreign common and preferred stock and warrants. </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">Predominantly includes corporate bonds, government bonds, municipal/provincial bonds, collateralized mortgage obligations, asset backed securities and commingled funds. </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(e)</td> <td valign="top" align="left">Predominantly includes cash investment in short term investment funds. </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(e)</td> <td valign="top" align="left">Includes domestic and international commingled funds. </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(f)</td> <td valign="top" align="left">Includes fixed income commingled funds. </td></tr></table>   <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="55%"> </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" nowrap="nowrap" align="center">Fair Value Measurements at December 31, 2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="14" nowrap="nowrap" 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" nowrap="nowrap" align="center">Total</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" 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" nowrap="nowrap" 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" nowrap="nowrap" align="center">Significant Unobservable Inputs (Level 3)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Asset Category</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <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"> Pension 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"> Equity</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <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"> Domestic (a)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">627</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">340</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">287</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> International (b)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">198</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">197</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Fixed Income (c)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">553</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">84</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">457</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">12</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Other</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <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"> Private Equity</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">55</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">55</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Real Estate</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">40</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">40</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Cash Equivalents (d)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">27</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">27</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" 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"> Pension Plan Assets Subtotal</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">1,500</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">648</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">745</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">107</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"> Other Postretirement 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"> Equity (e)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">145</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">125</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">20</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Fixed Income (f)</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">85</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">85</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Cash Equivalents</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">12</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">12</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" 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"> Postretirement Plan Assets Subtotal</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">242</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">222</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">20</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" 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"> Total Pension and Other Postretirement Plan Assets</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">1,742</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">870</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">765</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">107</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">Predominantly includes domestic common and preferred stock, warrants and commingled funds. </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">Predominantly includes foreign common and preferred stock. </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">Predominantly includes corporate bonds, government bonds, municipal/provincial bonds, collateralized mortgage obligations, asset backed securities, commingled funds and guaranteed contracts. </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">Predominantly includes investment in short term investment funds with $21 million held in equity accounts and $2 million held in fixed income accounts. </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(e)</td> <td valign="top" align="left">Includes domestic and international commingled funds. </td></tr></table> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="4%" align="left">(f)</td> <td valign="top" align="left">Includes fixed income commingled funds. </td></tr></table> There were no significant concentrations of risk in pension and other postretirement benefit plan assets at December 31, 2010 and 2009. Valuation Techniques Used to Determine Fair Value Equity Equity securities are primarily comprised of securities issued by public companies in domestic and foreign markets plus investments in commingled funds, which are valued on a daily basis. PHI can exchange shares of the publicly traded securities and the fair values are primarily sourced from the closing prices on stock exchanges where there is active trading, therefore they would be classified as level 1 investments. If there is less active trading, then the publicly traded securities would typically be priced using observable data, such as bid ask prices, and these measurements would be classified as level 2 investments. Investments that are not publicly traded and valued using unobservable inputs would be classified as level 3 investments. As a practical expedient, the fair values of PHI's interests in commingled funds are based on the Net Asset Value (NAV) of those funds. These funds have ongoing subscription and redemption activities. Commingled funds with publicly quoted NAV and active trading are classified as level 1 investments. Investments in commingled funds that are not publicly traded, but the underlying assets held in these funds are traded in active markets and the prices for these assets are readily observable, are classified as level 2 investments. Investments in commingled funds with redemption restrictions are classified as level 3 investments.   Fixed Income Fixed income investments are primarily comprised of fixed income securities and fixed income commingled funds. The prices for direct investments in fixed income securities are generated on a daily basis. Like the equity securities, fair values generated from active trading on exchanges are classified as level 1 investments. Prices generated from less active trading with wider bid ask prices are classified as level 2 investments. If prices are based on uncorroborated and unobservable inputs, then the investments are classified as level 3 investments. As a practical expedient, the fair values of PHI's interests in commingled funds are based on the NAV. These funds have ongoing subscription and redemption activities. Commingled funds with publicly quoted NAV and active trading are classified as level 1 investments. Investments in commingled funds that are not publicly traded, but the underlying assets held in these funds are traded in active markets and the prices for these assets are readily observable, are classified as level 2 investments. Investments in commingled funds with redemption restrictions are classified as level 3 investments. Other – Private Equity and Real Estate Investments in private equity and real estate funds are primarily invested in privately held real estate investment properties, trusts, and partnerships as well as equity and debt issued by public or private companies. As a practical expedient, PHI's interest in the fund or partnership is valued at the NAV. PHI's interest in these funds cannot be readily redeemed due to the inherent lack of liquidity and the primarily long-term nature of the underlying assets. Distribution is made through the liquidation of the underlying assets. PHI views these investments as part of a long-term investment strategy. These investments are valued by each investment manager based on the underlying assets. The majority of the underlying assets are valued using significant unobservable inputs and often require significant management judgment or estimation based on the best available information. Market data includes observations of the trading multiples of public companies considered comparable to the private companies being valued. The funds utilize valuation techniques consistent with the market, income, and cost approaches to measure the fair value of certain real estate investments. As a result, PHI classifies the measurement of these investments as level 3 investments. The investments in private equity and real estate funds require capital commitments, which may be called over a specific number of years. Unfunded capital commitments as of December 31, 2010 and 2009 totaled $42 million and $26 million, respectively. Reconciliations of the beginning and ending balances of PHI's fair value measurements using significant unobservable inputs (level 3) for investments in the pension plan for the years ended December 31, 2010 and 2009 are shown below:   <table border="0" cellspacing="0" cellpadding="0" width="100%" align="center"> <tr><td width="66%"> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom" rowspan="3"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="18" nowrap="nowrap" align="center">Fair Value Measurement Using Significant Unobservable  Inputs (Level 3)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom">  </td> <td valign="bottom" colspan="18" nowrap="nowrap" align="center">(millions of dollars)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">Equity</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">Fixed Income</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">Private Equity</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">Real Estate</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">Total Level 3</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" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">12</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">55</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">40</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">107</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> Transfer in (out) of Level 3</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">23</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">23</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Purchases, sales, and other</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">3</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(10</td> <td valign="bottom" nowrap="nowrap">)</td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">1</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">16</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">10</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> Unrealized gain/loss</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">4</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">2</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(1</td> <td valign="bottom" nowrap="nowrap">)</td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Realized gain/loss</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">1</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">4</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5</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> <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, 2010</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">30</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">3</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">62</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">55</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">150</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> <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="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" rowspan="3"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="14" nowrap="nowrap" align="center">Fair Value Measurement Using Significant Unobservable  Inputs (Level 3)</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom">  </td> <td valign="bottom" colspan="14" nowrap="nowrap" align="center"> (millions of dollars) </td> <td valign="bottom"> </td></tr> <tr><td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">Fixed Income</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">Private Equity</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">Real Estate</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" nowrap="nowrap" align="center">Total Level 3</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" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right"> 20</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right"> 32</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">69</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right"> 121</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Transfer in (out) of Level 3</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(8</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(8</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Purchases, sales, and other</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">5</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">6</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">11</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Unrealized gain/loss</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">18</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(29</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(11</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Realized gain/loss</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(6</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">(6</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"> Ending balance as of December 31, 2009</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">12</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">55</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">40</td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap">$</td> <td valign="bottom" nowrap="nowrap" align="right">107</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> Cash Flows Contributions - PHI Retirement Plan During 2010, the PHI Service Company made discretionary tax-deductible contributions totaling $100 million to the PHI Retirement Plan, which brought plan assets to at least the funding target level for 2010 under the Pension Protection Act. In 2009, PHI made discretionary tax-deductible contributions totaling $300 million to the PHI Retirement Plan, which brought plan assets to at least the funding target level for 2009 under the Pension Protection Act. Of this amount, $240 million was contributed through tax-deductible contributions from Pepco, ACE and DPL in the amounts of $170 million, $60 million and $10 million, respectively. The remaining $60 million contribution was made through tax-deductible contributions from the PHI Service Company. Although PHI projects there will be no quarterly minimum funding requirements under the Pension Protection Act guidelines in 2011, PHI currently plans to make a discretionary tax-deductible contribution of up to $150 million to bring its plan assets to at least the funding target level for 2011 under the Pension Protection Act. Contributions - Other Postretirement Benefit Plan In 2010 and 2009, Pepco contributed $10 million and $8 million, respectively, DPL contributed $9 million and $10 million, respectively, and ACE contributed $8 million and $6 million, respectively, to the other postretirement benefit plan. In 2010 and 2009, contributions of $8 million and $16 million, respectively, were made by other PHI subsidiaries. Assuming no changes to the other postretirement benefit plan assumptions, PHI expects to contribute similar amounts in 2011. Expected Benefit Payments Estimated future benefit payments to participants in PHI's pension and other postretirement benefit plans, which reflect expected future service as appropriate, are as follows (millions of dollars):   <table border="0" cellspacing="0" cellpadding="0" width="84%" align="center"> <tr><td width="72%"> </td> <td valign="bottom" width="11%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="11%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom" nowrap="nowrap"> Years</td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Pension Benefits</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Other  Postretirement Benefits</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> 2011</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">138</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">47</td> <td valign="bottom" nowrap="nowrap"> </td></tr> <tr><td valign="top"> 2012</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">123</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">48</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> 2013</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">121</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">50</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> 2014</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">126</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">51</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> 2015</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">127</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">52</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> 2016 through 2020</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">657</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">261</td> <td valign="bottom" nowrap="nowrap"> </td></tr></table>   Medicare Prescription Drug Improvement and Modernization Act of 2003 On December 8, 2003, the Medicare Prescription Drug Improvement and Modernization Act of 2003 (the Medicare Act) became effective. The Medicare Act introduced a prescription drug benefit under Medicare (Medicare Part D), as well as a federal subsidy to sponsors of retiree health care benefit plans that provide a benefit that is at least actuarially equivalent to Medicare Part D. Pepco Holdings sponsors postretirement health care plans that provide prescription drug benefits that PHI plan actuaries have determined are actuarially equivalent to Medicare Part D. At December 31, 2010, the accumulated postretirement benefit obligation has been reduced by the present value of projected Medicare Part D subsidies of $51 million. In each of 2010 and 2009, Pepco Holdings received $3 million in federal Medicare prescription drug subsidies. Pepco Holdings Retirement Savings Plan Pepco Holdings has a defined contribution retirement savings plan. Participation in the plan is voluntary. All participants are 100% vested and have a nonforfeitable interest in their own contributions and in the Pepco Holdings company matching contributions, including any earnings or losses thereon. Pepco Holdings' matching contributions were $11 million, $12 million, and $12 million for the years ended December 31, 2010, 2009, and 2008, respectively. </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescription containing the entire pension and other postretirement benefits disclosure as a single block of text.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS106-2 -Paragraph 20, 21, 22 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5, 6, 7, 8 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Implementation Guide (Q and A) -Number FAS88 -Paragraph 63 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7, 21, 22 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 30 -Paragraph 26 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-2 -Paragraph 8 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 8 -Subparagraph m Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph q falsefalsePENSION AND OTHER POSTRETIREMENT BENEFITS3false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.pepcoholdings.com/taxonomy/role/disclosurepensionandotherpostretirementbenefits1falsefalsefalse00falsefalsefalsefalsefalse2falsefalseUSDtruefalse{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_PensionAndOtherPostretirementBenefitsDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<div> (9) PENSION AND OTHER POSTRETIREMENT BENEFITS ACE accounts for its participation in the Pepco Holdings benefit plans as participation in a multi-employer plan. For 2010, 2009, and 2008, ACE was responsible for $23 million, $20 million and $12 million, respectively, of the pension and other postretirement net periodic benefit cost incurred by Pepco Holdings. ACE made discretionary tax-deductible contributions of $60 million to the PHI Retirement Plan for the year ended December 31, 2009. No contributions were made for the years ended December 31, 2010 and 2008. In addition, ACE made contributions of $8 million, $6 million and $7 million, respectively, to the other postretirement benefit plans for the years ended December 31, 2010, 2009 and 2008. At December 31, 2010 and 2009, ACE's Prepaid pension expense of $51 million and $63 million, and Other postretirement benefit obligations of $27 million and $25 million, respectively, effectively represent assets and benefit obligations resulting from ACE's participation in the Pepco Holdings benefit plans. </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescription containing the entire pension and other postretirement benefits disclosure as a single block of text.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS106-2 -Paragraph 20, 21, 22 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5, 6, 7, 8 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Implementation Guide (Q and A) -Number FAS88 -Paragraph 63 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7, 21, 22 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 30 -Paragraph 26 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-2 -Paragraph 8 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 8 -Subparagraph m Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph q falsefalsePENSION AND OTHER POSTRETIREMENT BENEFITS5false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.pepcoholdings.com/taxonomy/role/disclosurepensionandotherpostretirementbenefits1falsefalsefalse00falsefalsefalsefalsefalse3falsefalseUSDtruefalse{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_PensionAndOtherPostretirementBenefitsDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<div> (10) PENSION AND OTHER POSTRETIREMENT BENEFITS DPL accounts for its participation in the Pepco Holdings benefit plans as participation in a multi-employer plan. For 2010, 2009, and 2008, DPL was responsible for $28 million, $25 million and $3 million, respectively, of the pension and other postretirement net periodic benefit cost incurred by Pepco Holdings. DPL made discretionary, tax-deductible contributions of $10 million to the PHI Retirement Plan for the year ended December 31, 2009. No contributions were made for the years ended December 31, 2010 and 2008. In addition, DPL made contributions of $9 million, $10 million and $9 million, respectively, to the other postretirement benefit plans for the years ended December 31, 2010, 2009 and 2008. At December 31, 2010 and 2009, DPL's Prepaid pension expense of $139 million and $157 million, and Other postretirement benefit obligations of $22 million and $23 million, effectively represent assets and benefit obligations resulting from DPL's participation in the Pepco Holdings benefit plans. </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescription containing the entire pension and other postretirement benefits disclosure as a single block of text.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS106-2 -Paragraph 20, 21, 22 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5, 6, 7, 8 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Implementation Guide (Q and A) -Number FAS88 -Paragraph 63 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7, 21, 22 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 30 -Paragraph 26 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-2 -Paragraph 8 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 8 -Subparagraph m Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph q falsefalsePENSION AND OTHER POSTRETIREMENT BENEFITS7false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.pepcoholdings.com/taxonomy/role/disclosurepensionandotherpostretirementbenefits1falsefalsefalse00falsefalsefalsefalsefalse4falsefalseUSDtruefalse{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_PensionAndOtherPostretirementBenefitsDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<div> (9) PENSION AND OTHER POSTRETIREMENT BENEFITS Pepco accounts for its participation in the Pepco Holdings benefit plans as participation in a multi-employer plan. For 2010, 2009, and 2008, Pepco was responsible for $40 million, $38 million and $24 million, respectively, of the pension and other postretirement net periodic benefit cost incurred by Pepco Holdings. Pepco made discretionary, tax-deductible contributions of $170 million to the PHI Retirement Plan for the year ended December 31, 2009. No contributions were made for the years ended December 31, 2010 and 2008. In addition, Pepco made contributions of $10 million, $8 million, and $9 million, respectively, to the other postretirement benefit plans for the years ended December 31, 2010, 2009 and 2008. At December 31, 2010 and 2009, Pepco's Prepaid pension expense of $274 million and $295 million, and Other postretirement benefit obligations of $67 million and $71 million, effectively represent assets and benefit obligations resulting from Pepco's participation in the Pepco Holdings benefit plans. </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescription containing the entire pension and other postretirement benefits disclosure as a single block of text.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS106-2 -Paragraph 20, 21, 22 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5, 6, 7, 8 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Implementation Guide (Q and A) -Number FAS88 -Paragraph 63 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7, 21, 22 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 30 -Paragraph 26 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-2 -Paragraph 8 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 8 -Subparagraph m Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph q falsefalsePENSION AND OTHER POSTRETIREMENT BENEFITS18PENSION AND OTHER POSTRETIREMENT BENEFITSUnKnownUnKnownUnKnownUnKnownfalsetrue