Pension and Other Postretirement Benefits (Details) (USD $) In Millions	3 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2011	Jun. 30, 2011	Jan. 31, 2011	Dec. 31, 2010	Sep. 30, 2011 Other Postretirement Benefit Plans, Defined Benefit [Member]	Sep. 30, 2010 Other Postretirement Benefit Plans, Defined Benefit [Member]	Sep. 30, 2011 Other Postretirement Benefit Plans, Defined Benefit [Member]	Sep. 30, 2010 Other Postretirement Benefit Plans, Defined Benefit [Member]	Sep. 30, 2011 United States Pension Plans Of US Entity Defined Benefit Member	Sep. 30, 2010 United States Pension Plans Of US Entity Defined Benefit Member	Sep. 30, 2011 United States Pension Plans Of US Entity Defined Benefit Member	Sep. 30, 2010 United States Pension Plans Of US Entity Defined Benefit Member	Sep. 30, 2011 Foreign Pension Plans Defined Benefit Member	Sep. 30, 2010 Foreign Pension Plans Defined Benefit Member	Sep. 30, 2011 Foreign Pension Plans Defined Benefit Member	Sep. 30, 2010 Foreign Pension Plans Defined Benefit Member
Defined Benefit Plans Disclosures [Line Items]
Service Cost					$ 0	$ 1	$ 1	$ 2	$ 58	$ 55	$ 174	$ 166	$ 14	$ 12	$ 44	$ 38
Interest Cost					17	19	52	62	190	192	571	576	60	56	180	169
Expected Return on Plan Assets									(253)	(225)	(760)	(676)	(72)	(59)	(215)	(177)
Amortization of transition obligation													0	0	1	0
Amortization of Prior Service Cost					(3)	(13)	(25)	(31)	8	8	25	24	0	0	(1)	0
Recognition of Actuarial Losses					10	9	28	23	0	0	0	0	0	0	0	0
Settlements and Curtailments					(106)	0	(167)	(46)	0	0	24	0	1	0	2	4
Net Periodic Benefit Costs					(82)	16	(111)	10	3	30	34	90	3	9	11	34
Pension And Other Post Retirement Disclosure Paragraph Details [Abstract]
Voluntary cash contributions	400		1,000	250
Curtailments	$ 106	$ 61