XML 91 R60.htm IDEA: XBRL DOCUMENT v2.4.0.8
Debt (Details 4) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Debt    
Weighted-average life of long-term debt 11 years  
Maturities    
2015 $ 550  
2016 175  
2017 400  
2018 600  
Thereafter 5,000  
Total 6,725  
Aggregate unamortized net discount 15  
Other long-term obligations excluded from debt maturities 5  
Debt Covenant Compliance As of December 31, 2013, we were in compliance with the covenants contained in our credit agreements and indentures.  
Letters of credit
    
Debt    
Periods for which letters of credit are issued 70 days  
Outstanding letters of credit $ 41 $ 24