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Inventories
3 Months Ended
Feb. 28, 2013
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories are stated at the lower of cost or market value. All U.S. inventories are valued using the last-in, first-out (“LIFO”) method and represented approximately $68.9 million or 49.3% and $71.4 million or 52.2% of inventories at February 28, 2013 and November 30, 2012, respectively. The remaining portion of inventories (which are located outside of the U.S.) are valued using the first-in, first-out (“FIFO”) or average cost method. Interim LIFO calculations are based on management’s estimates of expected year-end inventory levels and costs and are subject to final year-end LIFO inventory valuations. 
(Dollars in millions)
February 28, 2013
 
November 30, 2012
Raw materials and supplies
$
48.6

 
$
48.6

Work-in-process
7.8

 
6.4

Finished products
83.5

 
81.8

Acquired cost of inventories
139.9

 
136.8

Excess of acquired cost over LIFO cost
(28.4
)
 
(29.9
)
Obsolescence reserves
(10.3
)
 
(10.7
)
Net Inventories
$
101.2

 
$
96.2