Fair Value Measurements (Details 3-Reported) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Estimate of Fair Value Measurement [Member]
Financial assets
Other noncurrent financial assets	$ 154		$ 189
Total financial assets	154		189
Financial liabilities
Other current financial liabilities	13		13
Long-term debt, including current portion(a)	6,922	[1]	7,610	[1]
Deferred credits and other liabilities	149		94
Total financial liabilities	7,084		7,717
Reported Value Measurement [Member]
Financial assets
Other noncurrent financial assets	147		186
Total financial assets	147		186
Financial liabilities
Other current financial liabilities	13		13
Long-term debt, including current portion(a)	6,427	[1]	6,642	[1]
Deferred credits and other liabilities	147		94
Total financial liabilities	$ 6,587		$ 6,749

[1] Excludes capital leases