Other Liabilities (Schedule of Other Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Other Liabilities [Abstract]
Accrued other long-term benefit costs (Note 17)	$ 4,063	$ 3,670
Accrued pension benefit costs (Note 17)	9,186	5,401
Accrued environmental remediation costs	316	317
Miscellaneous	1,943	1,638
Total other liabilities	$ 15,508	$ 11,026