Fair Value of Financial Instruments #1 (Unaudited) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Carrying Value
Marketable Securities
Trading securities	$ 311	$ 308
Available-for-sale securities	2	2
Derivatives	(3)	(2)
Long-term debt, including current portion	(5,929)	(5,930)
Fair Value
Marketable Securities
Trading securities	311	308
Available-for-sale securities	2	2
Derivatives	(3)	(2)
Long-term debt, including current portion	$ (6,422)	$ (6,227)