1.0.0.3 false B. ACQUISITION false 1 $ false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u001 Standard http://www.xbrl.org/2003/instance shares xbrli 0 u002 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 2 Notes to Financial Statements [Abstract] 0 oks_NotesToFinancialStatementsAbstract oks false na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false No definition available. false 3 Acquisition 1 us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock us-gaap true na duration string No definition available. false false false false false false false false false 1 false false 0 0 <div> <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">B.              ACQUISITION</font></div> <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br /></div> <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Acquisition of NGL Pipeline</font> - In October 2007, we completed the acquisition of an interstate natural gas liquids and refined petroleum products pipeline system and related assets from a subsidiary of Kinder Morgan Energy Partners, L.P. for approximately $300 million, before working capital adjustments.  The FERC-regulated system extends from Bushton and Conway, Kansas, to Chicago, Illinois, and transports, stores and delivers a full range of NGL products and refined petroleum products.  The transaction also included a 50 percent ownership interest in Heartland.  ConocoPhillips owns the other 50 percent of Heartland and is the managing partner of Heartland, which consists primarily of a refined petroleum products terminal and pipelines with access to two other refined petroleum products terminals.  Our investment in Heartland is accounted for under the equity method of accounting.  Financing for this transaction came from a portion of the proceeds of our September 2007 issuance of $600 million 6.85 percent Senior Notes due 2037.  The working capital settlement was finalized in April 2008, with no material adjustments.</font></div> </div> B.              ACQUISITION Acquisition of NGL Pipeline - In October 2007, false false No definition available. No authoritative reference available. false false 1 2 false UnKnown UnKnown UnKnown false true