v3.7.0.1

Operating Segments Operating Segments, Identifiable Assets (Details) - USD ($) $ in Millions | Mar. 31, 2017 | Dec. 31, 2016 | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Segment Reporting Information |  |  |  |  |
Cash and cash equivalents |  | $ 35 | $ 688 | $ 4 | $ 16
Assets |  | 5,873 | 5,860 |  |
Gathering and Processing [Member] |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Assets |  | 4,054 | 3,392 |  |
Terminalling and Transportation |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Assets |  | 1,775 | 1,768 |  |
Corporate and Other [Member] |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Assets | [1] | $ 44 | 700 |  |
Whiting Assets [Domain] |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Cash and cash equivalents |  |  | $ 672 |  |
[1] | Other consists mainly of $688 million in cash and cash equivalents as of December 31, 2016, of which $672 million was used to fund the acquisition of the North Dakota Gathering and Processing Assets on January 1, 2017, increasing the Gathering and Processing segment’s identifiable assets as of March 31, 2017.

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3044-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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