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Inventories | 6 Months Ended
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Jun. 30, 2017
Inventory Disclosure [Abstract] |
Inventories | (5) Inventories Inventories consist primarily of domestic and foreign crude oil, blending stock and components, work-in-progress, fertilizer products, and refined fuels and by-products. For all periods presented, inventories are valued at the lower of the first-in, first-out ("FIFO") cost or net realizable value for fertilizer products, refined fuels and by-products. Refinery unfinished and finished products inventory values were determined using the ability-to-bear process, whereby raw materials and production costs are allocated to work-in-process and finished products based on their relative fair values. Other inventories, including other raw materials, spare parts, and supplies, are valued at the lower of moving-average cost, which approximates FIFO, or net realizable value. The cost of inventories includes inbound freight costs. Inventories consisted of the following:
| June 30, 2017 |  | December 31, 2016
| (in millions)
Finished goods | $ | 133.4 |  |  | $ | 151.7 |
Raw materials and precious metals | 90.1 |  |  | 98.4 |
In-process inventories | 18.9 |  |  | 23.9 |
Parts and supplies | 75.9 |  |  | 75.2 |
Total Inventories | $ | 318.3 |  |  | $ | 349.2 |

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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