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Supplementary Information (Details 2) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Other income -net:      
Gain from change in benefit plan and postretirement plan   $ 5 $ 30
Gain from sale of land   2  
NAFTA award     58
Other 16 15 10
Other income-net 16 22 98
Financing costs-net:      
Interest expense, net of amounts capitalized 74 77 81
Interest income (11) (10) (5)
Foreign currency transaction losses 3   2
Financing costs-net 66 67 78
Interest capitalized $ 4 $ 6 $ 5