Pension And Other Postretirement Benefits (Change In Plan Assets Of Pension And Other Postretirement Benefits) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010
Pension Benefits - U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value at January 1	$ 10,835		$ 10,277
Actual return on plan assets	505		1,235
Foreign exchange rate changes
Company contribution	370
Other
Fair value at December 31	10,656		10,835
Pension Benefits - Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value at January 1	16,765		15,401
Actual return on plan assets	123		1,482
Foreign exchange rate changes	(192)		99
Company contribution	1,623		1,184
Other	(156)		(528)
Fair value at December 31	17,117		16,765
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value at January 1	558		514
Actual return on plan assets			63
Foreign exchange rate changes
Company contribution	39		38
Other			2
Fair value at December 31	538		558
Benefit Payments For Funded Plans [Member] | Pension Benefits - U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefits paid	(1,054)	[1]	(677)	[1]
Benefit Payments For Funded Plans [Member] | Pension Benefits - Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefits paid	(1,046)	[1]	(873)	[1]
Benefit Payments For Funded Plans [Member] | Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefits paid	$ (59)	[1]	$ (59)	[1]

[1] Benefit payments for funded plans.