Presentation - Reconciliations between Consolidated and Sector Deferred Taxes (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	$ 13,639us-gaap_DeferredTaxAssetsNet	$ 13,468us-gaap_DeferredTaxAssetsNet
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	570us-gaap_DeferredIncomeTaxLiabilities	598us-gaap_DeferredIncomeTaxLiabilities
Automotive [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Automotive sector current deferred income tax assets	2,039	1,574
Automotive sector non-current deferred income tax assets	13,331	13,436
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Automotive sector current deferred income tax liabilities	270	267
Automotive sector non-current deferred income tax liabilities	367	430
Financial Services [Member]
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	1,849	1,627
Financial Services [Member] \| Other assets [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	185	184
Intersector [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	15,555	15,194
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	2,486	2,324
Intersector Eliminations [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	(1,916)	(1,726)
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	$ (1,916)	$ (1,726)

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Amount of deferred tax liability attributable to taxable temporary differences.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Deferred Tax Liability

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-Name Accounting Standards Codification

-Topic 740

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-Number 210

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

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Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed within one year or operating cycle, if longer.

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