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Inventories (Tables) | 12 Months Ended
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Dec. 31, 2015
Inventories [Abstract] |
Inventory Amounts by Product Type | Our inventory amounts by product type were as follows at the dates indicated:
|  | December 31, |
|  | 2015 |  |  | 2014 |
NGLs |  | $ | 639.9 |  |  | $ | 579.1 |
Petrochemicals and refined products |  |  | 148.0 |  |  |  | 295.6 |
Crude oil |  |  | 222.1 |  |  |  | 97.8 |
Natural gas |  |  | 28.1 |  |  |  | 41.7 |
Total |  | $ | 1,038.1 |  |  | $ | 1,014.2 |
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 Year Ended December 31, |
| 2015 |  | 2014 |  | 2013 |
Cost of sales (1) |  | $ | 19,612.9 |  |  | $ | 40,464.1 |  |  | $ | 40,770.2 |
Lower of cost or market adjustments within cost of sales |  |  | 19.8 |  |  |  | 22.8 |  |  |  | 18.5 |
(1) Cost of sales is a component of "Operating costs and expenses," as presented on our 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 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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