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Miscellaneous financial information (Tables) | 12 Months Ended
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Dec. 31, 2014
Inventories of Crude Oil and Products | Inventories of crude oil and products at year-end consisted of the following:
millions of dollars |  | 2014 |  |  | 2013 |
Crude oil |  |  | 650 |  |  |  | 628 |
Petroleum products |  |  | 409 |  |  |  | 340 |
Chemical products |  |  | 53 |  |  |  | 54 |
Natural gas and other |  |  | 9 |  |  |  | 8 |
Total inventories of crude oil and products |  |  | 1,121 |  |  |  | 1,030 |

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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 2 -Paragraph 6 -Subparagraph a,b,c -Article 5 + Details
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