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Segmented Information - Share of E-Car Partnership (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Segment Reporting Information [Line Items] |  |  |
Total sales | $ 30,837 | $ 28,748 | $ 23,465
Equity loss | 151 | 121 | 132
Adjusted EBIT | 1,750 | 1,217 | 1,197
North America [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total sales | 16,335 | 14,855 | 12,370
Adjusted EBIT | 1,521 | 1,373 | 1,116
Europe [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total sales | 12,709 | 12,556 | 10,289
Adjusted EBIT | 165 | (22) | 117
Segment Corporate and Other [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total sales | (318) | (262) | (210)
Adjusted EBIT | 0 | (40) | (94)
Reportable Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total sales | 30,837 | 28,748 | 23,465
Adjusted EBIT | 1,658 | 1,367 | 1,211
E-Car [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total sales | 91 | 92 | 20
E-Car [Member] | North America [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total sales | 12 | 0 | 0
Equity loss | 0 | 0 | 0
Amortization of intangibles | 52 | 0 | 0
Adjusted EBIT | (76) | 0 | 0
E-Car [Member] | Europe [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total sales | 12 | 0 | 0
Equity loss | 0 | 0 | 0
Amortization of intangibles | 0 | 0 | 0
Adjusted EBIT | (6) | 0 | 0
E-Car [Member] | Segment Corporate and Other [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total sales | 0 | 0 | 8
Equity loss | 35 | 66 | 30
Amortization of intangibles | 0 | 0 | 0
Adjusted EBIT | (35) | (66) | (80)
E-Car [Member] | Reportable Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total sales | 24 | 0 | 8
Equity loss | 35 | 66 | 30
Amortization of intangibles | 52 | 0 | 0
Adjusted EBIT | $ (117) | $ (66) | $ (80)

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 6 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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