Pension, Other Postretirement Benefits and Savings Plans (Estimated Future Benefit Payments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
United States Pension Plan of US Entity, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2014	$ 456
2015	448
2016	439
2017	433
2018	433
2019-2023	2,095
Foreign Pension Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2014	151
2015	153
2016	160
2017	165
2018	169
2019-2023	946
Other Postretirement Benefits Without Medicare Part D Subsidy [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2014	35
2015	33
2016	32
2017	31
2018	30
2019-2023	144
Other Postretirement Benefits Medicare Part D Subsidy Receipts [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2014	(1)
2015	(1)
2016	(1)
2017	(1)
2018	(1)
2019-2023	$ (6)