2.2.0.25falsefalse006090 - Disclosure - Retirement Plans and Postretirement Benefit Planstruefalsefalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011
USD ($)
$c20110101to20110331http://www.sec.gov/CIK0000074145duration2011-01-01T00:00:002011-03-31T00:00:00U001Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2true0ogec_RetirementPlansAndPostretirementBenefitPlansAbstractogecfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse| 1falsefalsefalse00falsefalsefalsefalsefalse | Otherxbrli:stringItemTypestringNo definition available.falsefalse
3false0us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel| 1falsefalsefalse00<div><div><div align="justify" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: Times New Roman; font-size: 12pt; font-weight: bold;">9.           Retirement Plans and Postretirement Benefit Plans</font></div><div align="justify" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"> </div><div align="justify" style="text-indent: 40pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: Times New Roman; font-size: 12pt;">The details of net periodic benefit cost of the Company's portion of OGE Energy's Pension Plan, the Restoration of Retirement Income Plan and the postretirement benefit plans included in the Condensed Financial Statements are as follows:</font></div><div align="justify" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"> </div><div align="justify" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: -18pt;"><font style="display: inline; font-family: Times New Roman; font-size: 12pt; font-weight: bold;">Net Periodic Benefit Cost</font></div><div><table cellpadding="0" cellspacing="0" width="100%" style="font-family: times new roman; font-size: 12pt;"><tr><td colspan="2" valign="top" width="58%" style="border-bottom: black 2px solid; border-top: black 0.5pt solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td colspan="6" valign="top" width="21%" style="border-bottom: black 2px solid; border-top: black 0.5pt solid;"><div style="text-indent: 0pt; display: block;"> </div><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Pension Plan</font></div></td><td colspan="6" valign="bottom" width="20%" style="border-bottom: black 2px solid; border-top: black 0.5pt solid;"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Restoration of Retirement</font></div><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Income Plan</font></div></td></tr><tr><td colspan="2" valign="top" width="58%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td colspan="6" valign="top" width="21%"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">Three Months Ended</font></div></td><td colspan="6" valign="top" width="20%"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">Three Months Ended</font></div></td></tr><tr><td colspan="2" valign="top" width="58%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td colspan="6" valign="top" width="21%" style="border-bottom: black 2px solid;"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">March 31,</font></div></td><td colspan="6" valign="top" width="20%" style="border-bottom: black 2px solid;"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">March 31,</font></div></td></tr><tr><td align="left" colspan="2" valign="top" width="58%" style="border-bottom: black 2px solid;"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;"> <font style="font-style: italic; display: inline;">(In millions)</font></font></div></td><td colspan="3" valign="top" width="11%" style="border-bottom: black 2px solid;"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">2011</font></div></td><td colspan="3" valign="top" width="10%" style="border-bottom: black 2px solid;"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">2010</font></div></td><td colspan="3" valign="top" width="10%" style="border-bottom: black 2px solid;"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">2011</font></div></td><td colspan="3" valign="top" width="10%" style="border-bottom: black 2px solid;"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">2010</font></div></td></tr><tr><td align="left" colspan="2" valign="top" width="58%"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Service cost</font></div></td><td align="right" valign="top" width="2%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">$</font></div></td><td align="right" valign="top" width="7%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">2.7 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="2%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">$</font></div></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">2.6 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="2%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">$</font></div></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">---</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="2%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">$</font></div></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">---</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td align="left" colspan="2" valign="top" width="58%"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Interest cost</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="7%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">6.6 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">6.1 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">---</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">---</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td align="left" colspan="2" valign="top" width="58%"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Expected return on plan assets</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="7%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">(9.3)</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">(8.6)</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">---</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">---</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td align="left" colspan="2" valign="top" width="58%"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Amortization of net loss</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="7%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">3.9 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">3.9 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">---</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">---</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td align="left" colspan="2" valign="top" width="58%" style="border-bottom: black 2px solid;"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Amortization of unrecognized prior service cost</font></div></td><td valign="top" width="2%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="7%" style="border-bottom: black 2px solid;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">0.6 </font></div></td><td valign="top" width="2%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%" style="border-bottom: black 2px solid;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">0.6 </font></div></td><td valign="top" width="2%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%" style="border-bottom: black 2px solid;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">0.1</font></div></td><td valign="top" width="2%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%" style="border-bottom: black 2px solid;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">0.1</font></div></td><td valign="top" width="2%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td align="left" colspan="2" valign="top" width="58%" style="border-bottom: black 4px double;"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Net periodic benefit cost (A)</font></div></td><td align="right" valign="top" width="2%" style="border-bottom: black 4px double;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">$</font></div></td><td align="right" valign="top" width="7%" style="border-bottom: black 4px double;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">4.5 </font></div></td><td valign="top" width="2%" style="border-bottom: black 4px double;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="2%" style="border-bottom: black 4px double;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">$</font></div></td><td align="right" valign="top" width="6%" style="border-bottom: black 4px double;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">4.6 </font></div></td><td valign="top" width="2%" style="border-bottom: black 4px double;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="2%" style="border-bottom: black 4px double;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">$</font></div></td><td align="right" valign="top" width="6%" style="border-bottom: black 4px double;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">0.1</font></div></td><td valign="top" width="2%" style="border-bottom: black 4px double;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="2%" style="border-bottom: black 4px double;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">$</font></div></td><td align="right" valign="top" width="6%" style="border-bottom: black 4px double;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">0.1</font></div></td><td valign="top" width="2%" style="border-bottom: black 4px double;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td valign="top" width="5%"><div align="justify" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">(A)</font></div></td><td colspan="13" valign="top" width="94%"><div align="justify" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">In addition to the $4.6 million and $4.7 million of net periodic benefit cost recognized during the three months ended March 31, 2011 and 2010, respectively, the Company recognized an increase in pension expense during the three months ended March 31, 2011 and 2010 of $2.6 million and $1.9 million, respectively, to maintain the allowable amount to be recovered for pension expense in the Oklahoma jurisdiction which are identified as Deferred Pension Plan Expenses (see Note 1).</font></div></td></tr></table><div> </div><table cellpadding="0" cellspacing="0" width="100%" style="font-family: times new roman; font-size: 12pt;"><tr><td colspan="3" valign="top" width="59%" style="border-bottom: black 2px solid; text-align: left; border-top: black 0.5pt solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td colspan="6" valign="bottom" width="21%" style="border-bottom: black 2px solid; text-align: center; border-top: black 0.5pt solid;"><div style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Postretirement Benefit Plans</font></div></td><td valign="top" width="2%" style="padding-bottom: 2px;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%" style="padding-bottom: 2px;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%" style="padding-bottom: 2px;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%" style="padding-bottom: 2px;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%" style="padding-bottom: 2px;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%" style="padding-bottom: 2px;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td colspan="3" valign="top" width="59%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td colspan="6" valign="top" width="21%"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">Three Months Ended</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td colspan="3" valign="top" width="59%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td colspan="6" valign="top" width="21%" style="border-bottom: black 2px solid;"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">March 31,</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td align="left" colspan="3" valign="top" width="59%" style="border-bottom: black 2px solid;"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;"> <font style="font-style: italic; display: inline;">(In millions)</font></font></div></td><td colspan="3" valign="top" width="11%" style="border-bottom: black 2px solid;"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">2011</font></div></td><td colspan="3" valign="top" width="10%" style="border-bottom: black 2px solid;"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">2010</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td align="left" colspan="3" valign="top" width="59%"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Service cost</font></div></td><td align="right" valign="top" width="2%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">$</font></div></td><td align="right" valign="top" width="7%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">0.6 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="2%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">$</font></div></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">0.8 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td align="left" colspan="3" valign="top" width="59%"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Interest cost</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="7%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">2.5 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">3.4 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td align="left" colspan="3" valign="top" width="59%"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Expected return on plan assets</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="7%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">(1.2)</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">(1.7)</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td align="left" colspan="3" valign="top" width="59%"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Amortization of transition obligation</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="7%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">0.6 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">0.6 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td align="left" colspan="3" valign="top" width="59%"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Amortization of net loss</font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="7%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">3.9 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">2.3 </font></div></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td align="left" colspan="3" valign="top" width="59%" style="border-bottom: black 2px solid;"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Amortization of unrecognized prior service cost</font></div></td><td valign="top" width="2%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="7%" style="border-bottom: black 2px solid;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">(3.4)</font></div></td><td valign="top" width="2%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="6%" style="border-bottom: black 2px solid;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">--- </font></div></td><td valign="top" width="2%" style="border-bottom: black 2px solid;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr><tr><td align="left" colspan="3" valign="top" width="59%" style="border-bottom: black 4px double;"><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">Net periodic benefit cost</font></div></td><td align="right" valign="top" width="2%" style="border-bottom: black 4px double;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">$</font></div></td><td align="right" valign="top" width="7%" style="border-bottom: black 4px double;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt; font-weight: bold;">3.0 </font></div></td><td valign="top" width="2%" style="border-bottom: black 4px double;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td align="right" valign="top" width="2%" style="border-bottom: black 4px double;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">$</font></div></td><td align="right" valign="top" width="6%" style="border-bottom: black 4px double;"><div align="right" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">5.4 </font></div></td><td valign="top" width="2%" style="border-bottom: black 4px double;"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="6%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td><td valign="top" width="2%"><font style="display: inline; font-family: times new roman; font-size: 12pt;">  </font></td></tr></table></div><div style="text-indent: 0pt; display: block;"><br /></div><div align="justify" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="font-style: italic; display: inline; font-family: Times New Roman; font-size: 12pt; font-weight: bold;">Pension Plan Funding</font></div><div align="justify" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"> </div><div align="justify" style="text-indent: 40pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: Times New Roman; font-size: 12pt;">OGE Energy previously disclosed in its 2010 Form 10-K that it may contribute up to $50 million to its Pension Plan during 2011, of which $47 million is expected to be the Company's portion.  In April 2011, OGE Energy contributed $20 million to its Pension Plan, of which $18.8 million was the Company's portion.  OGE Energy currently expects to contribute an additional $30 million during the remainder of 2011.  Any remaining expected contributions to its Pension Plan during 2011 would be discretionary contributions, anticipated to be in the form of cash, and are not required to satisfy the minimum regulatory funding requirement specified by the Employee Retirement Income Security Act of 1974, as amended.</font></div><div align="justify" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"> </div><div align="justify" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="font-style: italic; display: inline; font-family: Times New Roman; font-size: 12pt; font-weight: bold;">Postretirement Benefit Plan (Retiree Medical)</font></div><div align="justify" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"> </div><div align="justify" style="text-indent: 40pt; display: block; margin-left: 0pt; margin-right: 0pt;"><font style="display: inline; font-family: Times New Roman; font-size: 12pt;">In January 2011, OGE Energy adopted amendments to its retiree medical plan.  Effective January 1, 2012, medical costs for pre-65 aged eligible retirees will be fixed at the 2011 level and OGE Energy will cover future annual medical inflationary cost increases up to five percent.  Increases in excess of five percent annually will be covered by the pre-65 aged retiree in the form of premium increases.  Also, effective January 1, 2012, OGE Energy will supplement Medicare coverage for Medicare-eligible retirees, providing them a fixed stipend based on OGE Energy's expected average 2011 premium for medical and drug coverage, and allow those Medicare-eligible retirees to acquire coverage from an OGE Energy-provided third-party administrator. The effect of these plan amendments is reflected in OGE Energy's March 31, 2011 Condensed Consolidated Balance Sheet as a reduction to the accumulated postretirement benefit obligation of $91.3 million, an increase in other comprehensive income of $16.9 million and a reduction to the Company's benefit obligations regulatory asset of $74.4 million (see Note 1).</font></div><div align="justify" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"> </div></div></div>9.           Retirement Plans and Postretirement Benefit Plans The details of net periodic benefitfalsefalsefalsefalsefalse | Otherus-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
falsefalse
12Retirement Plans and Postretirement Benefit PlansUnKnownUnKnownUnKnownUnKnownfalsetrue