| **Segment Reporting - Segment Reporting (Details) (USD $)In Millions, unless otherwise specified**                                                                                                                                            | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------|-----------------|----------------|-----------------|
||
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                |           |            |           |            |   |   |   |   |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |   |  |   |  |   |  |   |  |   |  |   |  |   |
| Concentration Risk, Percentage                                                                                                                                                                                                                |           |            |           |            |   |   |   |   |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |   |  |   |  |   |  |   |  |   |  |   |  | 13.00% |
| Concentration Risk, Customer                                                                                                                                                                                                                  |           |            |           |            |   |   |   |   | 0 |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |   |  |   |  |   |  |   |  |   |  |   |  |   |
| Number Of Regional Parts Distribution Centers                                                                                                                                                                                                 |           |            |           |            |   |   |   |   |   |  |   |  |   |  |   |  |   |  |   |  | 11 |  |   |  |   |  |   |  |   |  |   |  |   |   |  |   |  |   |  |   |  |   |  |   |  |   |
| Number Of Segments                                                                                                                                                                                                                            |           |            |           |            |   |   |   |   | 4 |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |   |  |   |  |   |  |   |  |   |  |   |  |   |
| Financing Fees And Revenue Reimbursement                                                                                                                                                                                                      |           |            |           |            |   |   |   |   |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  | $ 11 |   |  |   |  |   |  |   |  |   |  |   |  |   |
| External sales and revenues, net                                                                                                                                                                                                              |           |            |           |            |   |   |   |   | 10,775 |  | 12,695 |  | 13,641 |  | 6,312 |  | 7,946 |  | 8,591 |  | 2,558 |  | 2,497 |  | 2,562 |  | 1,747 |  | 2,084 |  | 2,288 |  |   | 158 | [1] | 168 | [1] | 200 | [1] | 0 |  | 0 |  | 0 |  |   |
| Intersegment sales and revenues                                                                                                                                                                                                               |           |            |           |            |   |   |   |   | 0 |  | 0 |  | 0 |  | 486 |  | 442 |  | 572 |  | 57 |  | 124 |  | 178 |  | 78 |  | 126 |  | 142 |  |   | 75 | [1] | 91 | [1] | 91 | [1] | (696) |  | (783) |  | (983) |  |   |
| External sales and revenues, net                                                                                                                                                                                                              | 2,751          | 2,861           | 2,526          | 2,637           | 3,179 | 3,246 | 3,261 | 3,009 | 10,775 |  | 12,695 |  | 13,641 |  | 6,798 |  | 8,388 |  | 9,163 |  | 2,615 |  | 2,621 |  | 2,740 |  | 1,825 |  | 2,210 |  | 2,430 |  |   | 233 | [1] | 259 | [1] | 291 | [1] | (696) |  | (783) |  | (983) |  |   |
| Sales and revenues, net                                                                                                                                                                                                                       | 2,751          | 2,861           | 2,526          | 2,637           | 3,179 | 3,246 | 3,261 | 3,009 | 10,775 |  | 12,695 |  | 13,641 |  | 6,798 |  | 8,388 |  | 9,163 |  | 2,615 |  | 2,621 |  | 2,740 |  | 1,825 |  | 2,210 |  | 2,430 |  |   | 233 | [1] | 259 | [1] | 291 | [1] | (696) |  | (783) |  | (983) |  |   |
| Net Income (Loss) Attributable to Parent                                                                                                                                                                                                      |           |            |           |            |   |   |   |   | (898) |  | (3,010) |  | 1,723 |  | (902) |  | (736) |  | 344 |  | 476 |  | 343 |  | 397 |  | (6) |  | (168) |  | 72 |  |   | 81 | [1] | 91 | [1] | 129 | [1] | (506) |  | (2,469) |  | 855 |  |   |
| Income (Loss) from Continuing Operations Attributable to Parent                                                                                                                                                                               |           |            |           |            |   |   |   |   | (857) |  | (2,939) |  | 1,797 |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |  |   |   |  |   |  |   |  |   |  |   |  |   |  |   |
| Income tax benefit (expense)                                                                                                                                                                                                                  |           |            |           |            |   |   |   |   | 171 |  | (1,780) |  | 1,417 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  |   | 0 | [1] | 0 | [1] | 0 | [1] | 171 |  | (1,780) |  | 1,417 |  |   |
| Segment profit (loss)                                                                                                                                                                                                                         |           |            |           |            |   |   |   |   | (1,028) |  | (1,159) |  | 380 |  | (902) |  | (736) |  | 344 |  | 476 |  | 343 |  | 397 |  | (6) |  | (168) |  | 72 |  |   | 81 | [1] | 91 | [1] | 129 | [1] | (677) |  | (689) |  | (562) |  |   |
| Depreciation and amortization                                                                                                                                                                                                                 |           |            |           |            |   |   |   |   | 417 |  | 323 |  | 328 |  | 305 |  | 216 |  | 230 |  | 17 |  | 16 |  | 16 |  | 32 |  | 36 |  | 34 |  |   | 40 | [1] | 33 | [1] | 28 | [1] | 23 |  | 22 |  | 20 |  |   |
| Interest Expense                                                                                                                                                                                                                              |           |            |           |            |   |   |   |   | 321 |  | 259 |  | 247 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  |   | 70 | [1] | 88 | [1] | 109 | [1] | 251 |  | 171 |  | 138 |  |   |
| Equity in income (loss) of non-consolidated affiliates                                                                                                                                                                                        |           |            |           |            |   |   |   |   | 11 |  | (29) |  | (71) |  | 10 |  | (1) |  | 0 |  | 6 |  | 5 |  | 5 |  | (5) |  | (33) |  | (76) |  |   | 0 | [1] | 0 | [1] | 0 | [1] | 0 |  | 0 |  | 0 |  |   |
| Capital expenditures                                                                                                                                                                                                                          |           |            |           |            |   |   |   |   | $ (167) | [2] | $ (309) | [2] | $ (429) | [2] | $ (142) | [2] | $ (173) | [2] | $ (171) | [2] | $ (2) | [2] | $ (21) | [2] | $ (19) | [2] | $ (9) | [2] | $ (50) | [2] | $ (84) | [2] |   | $ (2) | [1],[2] | $ (3) | [1],[2] | $ (2) | [1],[2] | $ (12) | [2] | $ (62) | [2] | $ (153) | [2] |   |
|                                                                                                                                                                                                                                               |
| [1](A)Total sales and revenues in the Financial Services segment include interest revenues of $181 million, $254 million, and $285 million for 2013, 2012, and 2011, respectively.[2](B)Exclusive of purchases of equipment leased to others. |

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Number Of Regional Parts Distribution Centers
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Amount of profit or loss recognized by the reportable segment.
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| - Definition
Description of risks that arise due to the volume of business transacted with a particular customer. At a minimum, the description informs financial statement users of the general nature of the risk, but excludes "Information about Major Customers" that may be disclosed elsewhere (for instance, segment disclosures).
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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.
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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.
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| - Definition
Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.
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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.
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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
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Amount of the cost of borrowed funds accounted for as interest expense.
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| - Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.
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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.
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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).
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