SUPPLEMENTARY INFORMATION (Accrued and other current liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accrued and other current liabilities	$ 2,656	$ 2,463
Accrued and Other Current Liabilities [Member]
Accrued payroll	$ 620	$ 475