v2.4.0.8
Fair Value Measurements Fair Value Measurements (Details Textuals) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Fair Value Measurements Textuals Abstract    
Long-term debt and current portion of long term debt, carrying value $ 9,536 $ 10,079
Long-term debt and current portion of long-term debt, fair value $ 9,665 $ 10,796