XML 28 R50.htm IDEA: XBRL DOCUMENT v2.4.0.6
COMMITMENTS (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Purchase obligations [Abstract]  
Purchase Obligations $ 2,600,000,000
Purchase Obligation Description over a period of approximately 15 years for materials, supplies, and energy incident to the ordinary conduct of business.
Lease commitments [Abstract]  
Operating Lease Commitments, Cancelable Noncancelable and Month-to-month 220,000,000
Percentage of Operating Lease Commitments related to machinery and equipment (in hundredths) 5.00%
Percentage of Operating Lease Commitments related to real property (in hundredths) 60.00%
Percentage of Operating Lease Commitments related to railcars (in hundredths) 35.00%
Guarantees [Abstract]  
Operating Lease Residual Value Guarantees 110,000,000
Maximum potential future payment, other guarantees $ 60,000,000
Guarantor Obligations, Term other guarantees have terms of between 1 and 15 years