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Inventories (Tables) | 6 Months Ended
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Jun. 30, 2013
Inventories [Abstract] |
Inventory Amounts by Product Type | Our available-for-sale inventory amounts by product type were as follows at the dates indicated:
|  | June 30, 2013 |  |  | December 31, 2012 |
NGLs |  | $ | 799.1 |  |  | $ | 594.3 |
Petrochemicals and refined products |  |  | 394.0 |  |  |  | 304.5 |
Crude oil |  |  | 156.9 |  |  |  | 119.4 |
Natural gas |  |  | 61.4 |  |  |  | 70.2 |
Total |  | $ | 1,411.4 |  |  | $ | 1,088.4 |
Cost of Sales and Lower of Cost or Market Adjustments | 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 June 30, |  |  | For the Six Months Ended June 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Cost of sales (1) |  | $ | 9,458.3 |  |  | $ | 8,195.2 |  |  | $ | 19,150.8 |  |  | $ | 17,861.0 |
Lower of cost or market adjustments |  |  | 7.7 |  |  |  | 8.0 |  |  |  | 10.4 |  |  |  | 13.9 |
(1) Cost of sales is a component of "Operating costs and expenses," as presented on our Unaudited Condensed Statements of Consolidated Operations. Period-to-period 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 2 -Paragraph 6 -Subparagraph a,b,c -Article 5 + Details
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