XML 39 R50.htm IDEA: XBRL DOCUMENT v2.4.0.8
Significant Accounting Policies (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
item
Dec. 31, 2012
Dec. 31, 2011
Significant Accounting Policies      
Number of countries in which the entity operates 21    
Stock-Based Compensation      
Compensation cost recognized for equity instruments for which employees do not render the required service $ 11 $ 11 $ 1
Maximum
     
Equity Method Investments      
General ownership percentage for equity method investments 50.00%    
Minimum
     
Equity Method Investments      
General ownership percentage for equity method investments 20.00%