XML 23 R37.htm IDEA: XBRL DOCUMENT v2.4.0.8
Inventories (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Inventories      
Finished goods $ 1,037 $ 958 $ 1,014
Raw materials 121 113 124
Operating supplies 46 46 40
Inventories $ 1,204 $ 1,117 $ 1,178