Pension, Other Postretirement Benefits and Savings Plans Estimated Future Benefit Payments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year Maximum	$ 600
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2012	406
2013	402
2014	402
2015	420
2016	418
2017-2021	2,057
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2012	145
2013	152
2014	153
2015	159
2016	166
2017-2021	877
Other Postretirement Benefits Without Medicare Part D Subsidy [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2012	58
2013	53
2014	50
2015	47
2016	44
2017-2021	204
Other Postretirement Benefits Medicare Part D Subsidy Receipts [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2012	(4)
2013	(4)
2014	(4)
2015	(3)
2016	(3)
2017-2021	$ (13)