Shareowners' Equity (Reclass Out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Benefit (provision) for income taxes	[1]	$ 365	$ 401	$ 7,466	$ 1,034
Net earnings (loss)	[1]	2,545	3,509	(12,198)	10,006
Total Costs and Expenses	[1]	28,423	28,903	87,127	85,620
Financial Services Revenue	[1]	5,984	5,959	16,373	17,964
Interest and other financial charges	[1]	1,462	1,325	3,976	3,975
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	[1]	3,257	3,204	5,604	8,975
Investment Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other Income		45	34	116	53
Benefit (provision) for income taxes		(20)	(15)	(45)	(19)
Net earnings (loss)		26	19	70	34
Investment Securities | Discontinued operations
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Benefit (provision) for income taxes		(15)	(15)	(21)	(13)
Financial Services Revenue		28	40	45	34
Currency Translation Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Benefit (provision) for income taxes		(628)	1	(779)	124
Net earnings (loss)		(733)	15	(1,039)	(25)
Total Costs and Expenses		(104)	14	(260)	(149)
Currency Translation Adjustment | Discontinued operations
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Benefit (provision) for income taxes		(628)	0	(764)	123
Total Costs and Expenses		(104)	1	(102)	(128)
Cash Flow Hedge
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Benefit (provision) for income taxes		11	30	59	39
Net earnings (loss)		(98)	(384)	(632)	(557)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest		(109)	(414)	(691)	(596)
Cash Flow Hedge | Interest Rate Contract
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest and other financial charges		(39)	(53)	(100)	(182)
Cash Flow Hedge | Foreign Exchange Contract
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest and other financial charges		(72)	(381)	(600)	(400)
Cash Flow Hedge | Foreign Exchange Contract | Discontinued operations
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest Income (Expense), Net		(25)	(24)	(13)	(32)
Financial Services Revenue		(47)	(357)	(587)	(368)
Cash Flow Hedge | Other Contract [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Total Costs and Expenses		2	20	9	(14)
Pension Plan, Defined Benefit
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Benefit (provision) for income taxes		314	316	950	870
Net earnings (loss)		(584)	(592)	(1,795)	(1,639)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest		(898)	(908)	(2,745)	(2,509)
Curtailment gain (loss)		0	(113)	121	(113)
Defined Benefit Plan, Amortization of Gains (Losses)		(881)	(648)	(2,673)	(1,931)
Prior service cost amortization		17	147	193	465
Reclassification out of AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net earnings (loss)		$ (1,389)	$ (942)	$ (3,396)	$ (2,187)

[1] Amounts may not add due to rounding.