Fair Value of Financial Instruments (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financial Assets (Liabilities)
Debt and Capital Lease Obligations	$ (5,930)	$ (3,935)
Carrying Value
Financial Assets (Liabilities)
Trading securities	308	259
Available-for-sale	2	3
Derivative Assets (Liabilities), at Fair Value, Net	(2)	(1)
Long-term debt, including current portion, fair value	(5,930)	(3,935)
Fair Value
Financial Assets (Liabilities)
Trading securities	308	259
Available-for-sale	2	3
Derivative Assets (Liabilities), at Fair Value, Net	(2)	(1)
Long-term debt, including current portion, fair value	$ (6,227)	$ (4,834)