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Inventories (Tables) | 9 Months Ended
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Sep. 30, 2015
Inventories [Abstract] |
Inventory Amounts by Product Type | Our inventory amounts by product type were as follows at the dates indicated:
|  | September 30, 2015 |  |  | December 31, 2014 |
NGLs |  | $ | 740.5 |  |  | $ | 579.1 |
Petrochemicals and refined products |  |  | 158.0 |  |  |  | 295.6 |
Crude oil |  |  | 152.2 |  |  |  | 97.8 |
Natural gas |  |  | 34.7 |  |  |  | 41.7 |
Total |  | $ | 1,085.4 |  |  | $ | 1,014.2 |
Cost of Sales and Lower of Cost or Market Adjustments | Due to fluctuating commodity prices, we recognize lower of cost or market adjustments when the carrying value of our available-for-sale inventories exceeds their net realizable value. The following table presents our total cost of sales amounts and lower of cost or market adjustments for the periods indicated:
|  | For the Three Months Ended September 30, |  |  | For the Nine Months Ended September 30, |
|  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Cost of sales (1) |  | $ | 4,419.9 |  |  | $ | 10,455.1 |  |  | $ | 15,355.9 |  |  | $ | 32,213.1 |
Lower of cost or market adjustments |  |  | 2.1 |  |  |  | 6.7 |  |  |  | 6.1 |  |  |  | 14.6 |
(1) Cost of sales is a component of “Operating costs and expenses” as presented on our Unaudited Condensed Statements of Consolidated Operations. Fluctuations in these amounts are primarily due to changes in energy commodity prices and sales volumes associated with our marketing activities. |

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- Definition Tabular disclosure of the summary of costs related to goods produced and sold and services rendered during the period. Discloses any lower of cost or market adjustment recorded during the period. + References No definition available. + Details
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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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