Shareowners' Equity and Noncontrolling Interest (Reclass and Changes in Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	$ (5,325)			$ (5,325)			$ (5,448)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				(320)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				443
Income Tax Expense (Benefit)	614		484	1,677		1,257
Sales Revenue, Goods, Net	11,243		10,839	33,159		28,843
Other Income	187		211	917		851
Income from continuing operations	1,526		1,341	4,523		4,163
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	(28)			(28)			3
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				(48)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				17
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense (Benefit)	(1)			3
Income from continuing operations	1			(20)
Net Income (Loss) Available to Common Stockholders, Basic	0			(17)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign Exchange Contract [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Sales Revenue, Goods, Net	1			(22)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Other Contract [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other Income	0			2
Accumulated Translation Adjustment [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	246			246			654
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				(439)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				31
Accumulated Translation Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other Income	1			(31)
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	(5,778)			(5,778)			(6,250)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				27
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				445
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense (Benefit)	71			235
Other Comprehensive (Income) Loss Amortization Adjustment from AOCI Pension and Other Postretirement Benefit Plans for Net Prior Service Cost (Credit) and Net Transition Asset (Obligation), before Tax	10	[1]		34	[1]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax	(236)	[1]		(714)	[1]
Income from continuing operations	(226)			(680)
Net Income (Loss) Available to Common Stockholders, Basic	(155)			(445)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	235			235			145
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				140
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				(50)
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense (Benefit)	(10)			(31)
Other Income	27			81
Net Income (Loss) Available to Common Stockholders, Basic	$ 17			$ 50

[1] (1) These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 7 for additional details).