Supplemental Balance Sheet Information (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Other current assets
Other current assets	$ 1,329	$ 1,279
Investments
Total investments	108	122
Other assets
Total other assets	934	980
Other current liabilities
Dividends payable		567
Total other current liabilities	2,680	2,891
Other liabilities
Total other liabilities	$ 1,791	$ 1,984