XML 43 R64.htm IDEA: XBRL DOCUMENT v2.4.0.8
Inventories - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Inventory Disclosure [Line Items]          
Percent of Last-in, First-out (LIFO) inventory to total inventory values 61.00%   61.00%   56.00%
Estimate in excess of current acquisition costs over stated inventory values $ 1,100,000,000   $ 1,100,000,000   $ 1,000,000,000
Cost of sales increase/reduction, liquidations of LIFO inventories 3,000,000 5,000,000 3,000,000 16,000,000  
Land held for residential or commercial development $ 84,000,000   $ 84,000,000   $ 86,000,000