Income Taxes (Significant Components Of Deferred Tax Assets Net Of Deferred Tax Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred Tax Assets, Net Of Deferred Tax Liabilities [Line Items]
Net deferred tax assets	$ (1,890)us-gaap_DeferredTaxAssetsNet	$ (3,303)us-gaap_DeferredTaxAssetsNet
Valuation Allowance - Inventory and long-term contract methods of income recognition, fixed assets and other	18	20
Valuation Allowance - Net operating loss, credit and capital loss carryovers	63	105
Deferred tax asset for net operating loss and credit carryovers each year through December 31, 2033	252
Deferred tax asset for net operating loss and credit carryovers indefinitely	14us-gaap_OperatingLossCarryforwards
Deferred tax assets related to Accumulated other comprehensive loss	8,007	5,818
Pension benefits
Deferred Tax Assets, Net Of Deferred Tax Liabilities [Line Items]
Net deferred tax assets	6,145	3,099
Inventory and long-term contract methods of income recognition, fixed assets and other (net of valuation allowance of $18 and $20)
Deferred Tax Assets, Net Of Deferred Tax Liabilities [Line Items]
Net deferred tax assets	(11,589)	(9,948)
Partnerships and joint ventures
Deferred Tax Assets, Net Of Deferred Tax Liabilities [Line Items]
Net deferred tax assets	9	(62)
Retiree health care benefits
Deferred Tax Assets, Net Of Deferred Tax Liabilities [Line Items]
Net deferred tax assets	2,572	2,458
Other employee benefits
Deferred Tax Assets, Net Of Deferred Tax Liabilities [Line Items]
Net deferred tax assets	1,477	1,773
In-process research and development related to acquisitions
Deferred Tax Assets, Net Of Deferred Tax Liabilities [Line Items]
Net deferred tax assets	10	23
Net operating loss, credit and capital loss carryovers (net of valuation allowance of $63 and $105)(1)
Deferred Tax Assets, Net Of Deferred Tax Liabilities [Line Items]
Net deferred tax assets	266	362
Customer and commercial financing
Deferred Tax Assets, Net Of Deferred Tax Liabilities [Line Items]
Net deferred tax assets	(853)	(990)
Unremitted earnings of non-U.S. subsidiaries
Deferred Tax Assets, Net Of Deferred Tax Liabilities [Line Items]
Net deferred tax assets	(37)	(44)
Other net unrealized losses
Deferred Tax Assets, Net Of Deferred Tax Liabilities [Line Items]
Net deferred tax assets	$ 110	$ 26

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Operating Loss Carry Forwards Subject To Limitations Of Up to Nineteen Years

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- Definition

Valuation allowance on inventory and long term contract methods of income recognition, fixed assets and other.

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- Definition

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from unrealized losses in other comprehensive income.

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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- Definition

The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.

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