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Inventories
9 Months Ended
Sep. 30, 2013
Inventory Disclosure [Abstract]  
Inventories
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. Inventories are valued at the lower of the first-in, first-out (“FIFO”) cost or market for fertilizer products, refined fuels and by-products for all periods presented. 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 market. The cost of inventories includes inbound freight costs.

Inventories consisted of the following:

 
September 30, 2013
 
December 31, 2012
 
(in millions)
Finished goods
$
362.4

 
$
275.2

Raw materials and precious metals
194.6

 
164.3

In-process inventories
78.5

 
42.8

Parts and supplies
44.8

 
45.8

 
$
680.3

 
$
528.1