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USD ($)

USD ($) / shares

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TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"&gt;&lt;a id="SupplementalOG" name="SupplementalOG"&gt;&lt;!--EFPlaceholder--&gt;&lt;/a&gt;8.&lt;/font&gt;&lt;/div&gt;&lt;/td&gt;&lt;td&gt;&lt;div align="left"&gt;&lt;font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"&gt;Supplemental Information on Oil and Gas Producing Activities (Unaudited)&lt;/font&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"&gt;&amp;#160;&lt;/div&gt;&lt;div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"&gt;At December 31, 2010, through our ownership of i-units, we owned approximately 29.1% of all of KMP&amp;#8217;s outstanding limited partner interests.&amp;#160;&amp;#160;As discussed above, our results of operations are derived principally from our investment in KMP. &amp;#160;We use the equity method of accounting for our investment in KMP, and record our share of its earnings and accumulated other comprehensive income.&amp;#160;&amp;#160;Though we do not directly have interests in oil and gas producing activities, our equity method investee, KMP, has significant oil and gas producing activities. &amp;#160;Additional information on KMP&amp;#8217;s oil and gas producing activities are contained in its Annual Report on Form 10-K for the year ended December 31, 2010, which is included in this filing as Exhibit 99.1 and incorporated herein by reference.&lt;/font&gt;&lt;/div&gt;</NonNumbericText><NonNumericTextHeader>8.Supplemental Information on Oil and Gas Producing Activities (Unaudited)&amp;#160;At December 31, 2010, through our ownership of i-units, we owned approximately</NonNumericTextHeader><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios></Cell></Cells><OriginalInstanceReportColumns /><Unit>Other</Unit><ElementDataType>us-types:textBlockItemType</ElementDataType><SimpleDataType>string</SimpleDataType><ElementDefenition>This text block may contain all or parts of the required disclosures for oil and gas producing industries in tables or other formats.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 19
 -Paragraph 59A-59Z, 59AA, 59BB, 59CC

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